A strong auto folding knife choice should match the opening mechanism you actually want, with a blade size and handle you can carry and control; this roundup suits shoppers comparing OTF-style and push-button designs with assisted folders. The six options are not interchangeable: the Smith & Wesson MPOTF10 is identified as an OTF model, while several others explicitly use spring assistance. The listings also vary in blade length, weight, edge style, and emergency features, so compare those details rather than treating every fast-opening folder as an automatic.
We rank the options by how closely their stated mechanism fits the keyword, then by useful specifications and included features. Check local rules and the maker’s instructions before carrying or operating any automatic or assisted knife.
The Smith & Wesson MPOTF10 Serrated Grey leads because its product name identifies it as an OTF knife, making it the closest stated match for shoppers seeking an auto folding knife. It pairs a 3.5-inch AUS-8 stainless-steel blade with an aluminum handle, a safety lock, and a hardened glass breaker. Its listing does not explain the deployment control, so confirm the operating details before choosing it.
For buyers open to alternatives, the push-button model and spring-assisted folders use different mechanisms.
Our Top Picks
Best OverallIts OTF model name most closely matches the automatic-knife search, and it adds a 3.5-inch AUS-8 blade, safety lock, and glass breaker.
View on Amazon
Best Push ButtonThe push-button lock design is the closest alternative mechanism; it has a compact 7-centimeter 440C reverse-tanto blade and T6 aluminum handle.
View on Amazon
Longest BladeIts M.A.G.I.C. assisted opening is explicit, with a 3.6-inch partially serrated blade and 8.6-inch overall length.
View on Amazon- Emergency Features MTech USA MT-A845BK
Compare the knife styles and key features
| # | Product | Handle Material | Blade Material | Size | Buy |
|---|---|---|---|---|---|
| 1 | 1. Smith & Wesson MPOTF10Best Overall | — | — | 8.66" | View on Amazon |
| 2 | 2. Generic Push Button KnifeBest Push Button | T6 aviation aluminum | Stainless Steel | 6.69 in | View on Amazon |
| 3 | 3. Smith & Wesson SWMP4LSLongest Blade | Aluminum | Stainless Steel | 3.6" | View on Amazon |
| 4 |  4. MTech USA MT-A845BKEmergency Features | Aluminum | Stainless Steel | 3.8" | View on Amazon |
| 5 |  5. Grand Way 6688Tanto blade outdoor utility | Metal | Stainless Steel | 3.5" | View on Amazon |
| 6 |  6. Smith & Wesson SWA24SLightweight ambidextrous carry | Aluminum | High Carbon Stainless Steel | 3.1" | View on Amazon |
Detailed Reviews: Best Auto Folding Knife
#1 · Best Overall
1. Smith & Wesson MPOTF10
- Size: 8.66"
Best for: Serrated emergency-ready folder.
Why it ranks #1: Its OTF model name most closely matches the automatic-knife search, and it adds a 3.5-inch AUS-8 blade, safety lock, and glass breaker.
A hardened glass breaker sits alongside the 3.5-inch serrated spear-point blade, giving the Smith & Wesson MPOTF10 an emergency-use feature beyond cutting. Its safety lock, aluminum handle, and 6-ounce listed weight make it a substantial folding option for buyers who want those functions together.
The blade uses AUS-8 stainless steel with a black oxide finish, while the aluminum handle measures 5.16 inches and the overall knife is 8.66 inches long. The serrated edge suits buyers specifically seeking a toothed cutting profile, and the spear-point shape gives the blade a defined form. A safety lock is listed for protection, and the hardened glass breaker adds an emergency tool. At 6 ounces, it is not the lightest option for pocket carry.
- 3.5-inch serrated spear-point blade
- AUS-8 stainless steel with black oxide finish
- Hardened glass breaker for emergency use
- Aluminum handle and safety lock
- The 6-ounce listed weight is higher than the Smith & Wesson Extreme Ops SWA24S at 3.5 ounces.
Skip it if you prioritize the lightest pocket carry; the Smith & Wesson Extreme Ops SWA24S weighs 3.5 ounces and includes a pocket clip.
The MPOTF10 fits buyers who want a serrated blade, safety lock, and glass breaker in one folder. Its 6-ounce listed weight and 8.66-inch overall length are important carry considerations.
Full product details
| Brand | Smith & Wesson |
|---|---|
| Color | Gray |
| Included Components | Knife |
| Item Dimensions LxWxH | 1 x 1 x 1 inches |
| Item Package Dimensions L x W x H | 13.23 x 10.31 x 2.05 inches |
| Item Weight | 5.6 ounces |
| Manufacturer | Battenfeld Technologies, Inc. |
| Material | Steel |
| Model | MPOTF10 Serrated Grey |
| Package Weight | 0.29 kg |
| Size | 8.66" |
| Style | Modern |
| Warranty Description | Limited Lifetime |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Smith & Wesson MPOTF10 Gray/Black Serrated – Box
View on Amazon#2 · Best Push Button
2. Generic Push Button Knife
- Handle Material: T6 aviation aluminum
- Blade Material: Stainless Steel
- Size: 6.69 in
Best for: Compact push-button folder.
Why it ranks #2: The push-button lock design is the closest alternative mechanism; it has a compact 7-centimeter 440C reverse-tanto blade and T6 aluminum handle.
A push-button lock distinguishes this compact reverse-tanto folder, pairing a 7 cm 440C blade with a T6 aviation aluminum handle. At 17 cm overall and 60 g net weight, it suits buyers seeking a small, light folding knife for camping, emergency, or bushcraft use.
The blackwashed reverse-tanto blade is 2.5 mm thick and made from 440C stainless steel; the listed feature description highlights resistance to outdoor acidic and corrosive exposure. Its 10 cm handle is made from T6 aviation aluminum, while the reversible deep-carry pocket clip supports carry placement choices. The push-button lock is the named locking mechanism. Compact dimensions and low net weight make storage less burdensome, although the 7 cm blade limits reach compared with longer folders.
- Push-button lock
- 7 cm blackwashed reverse-tanto 440C blade
- T6 aviation aluminum handle
- Reversible deep-carry pocket clip
- The 7 cm blade is shorter than the 3.5-inch blade on the Smith & Wesson MPOTF10.
Skip it if you need a longer blade for your tasks; the Smith & Wesson MPOTF10 has a 3.5-inch blade and a safety lock.
This is a fit for buyers prioritizing a compact, light folder with a push-button lock and reversible deep-carry clip. Its 7 cm blade is the key boundary if your intended tasks require more reach.
Full product details
| Brand | Generic |
|---|---|
| Blade Material | Stainless Steel |
| Blade Shape | Reverse Tanto |
| Blade Type | Reverse Tanto |
| Color | Black |
| Handle Material | T6 aviation aluminum |
| Included Components | Belt Clip |
| Model | Push Button Lock Knife |
| Recommended Uses | Bushcrafting, Camping, Emergency |
| Size | 6.69 inches |
| Special Feature | Foldable |
| Special Features | Foldable |
| Style | Compact |
Listed on Amazon as: Push Button Lock Knife, Tactical EDC Folding Knife, Black Stonewashed Reverse Tanto Blade Aluminum Handle Outdoor Hunting Camping Knives With Reversible Deep Carry Pocket Clip For Men
View on Amazon#3 · Longest Blade
3. Smith & Wesson SWMP4LS
- Handle Material: Aluminum
- Blade Material: Stainless Steel
- Size: 3.6"
Best for: Assisted serrated everyday carry.
Why it ranks #3: Its M.A.G.I.C. assisted opening is explicit, with a 3.6-inch partially serrated blade and 8.6-inch overall length.
M.A.G.I.C. assisted opening pairs with a flipper/finger actuator for quick access to this 3.6-inch partially serrated clip-point blade. The mechanism and pocket clip make it a practical option for buyers who want a larger folding knife readily carried for outdoor, tactical, or everyday use.
The 4034 high-carbon stainless-steel blade has a black oxide finish, while the aluminum handle includes a rubber inlay. That combination gives buyers a defined grip surface alongside a corrosion-resistant blade material. At 8.6 inches overall and 7.6 ounces, it is a substantial pocket-knife choice rather than a minimal carry. Its assisted opening and clip support access and storage, but hand-wash-only care is worth factoring into routine maintenance.
- M.A.G.I.C. assisted opening with flipper/finger actuator
- 3.6-inch partially serrated clip-point blade
- 4034 high-carbon stainless steel with black oxide finish
- Aluminum handle with rubber inlay and pocket clip
- At 7.6 ounces, it is heavier than a lightweight everyday-carry knife.
Skip it if you want a lighter folding knife for daily carry; the Smith & Wesson Extreme Ops SWA24S weighs 3.5 ounces.
This suits buyers who want assisted access, a serrated edge, and a grippy aluminum handle for outdoor or everyday carry. Consider its 7.6-ounce listed weight before choosing it for a lightweight pocket setup.
Full product details
| Brand | Smith & Wesson |
|---|---|
| Blade Edge | Plain/Serrated |
| Blade Material | Stainless Steel |
| Blade Shape | Drop Point |
| Blade Type | Clip Point |
| Color | Black |
| Handle Material | Aluminum |
| Included Components | Knife |
| Item Weight | 6.4 ounces |
| Manufacturer | Smith & Wesson |
| Model | SWMP4LS |
| Model Number | SWMP4LS |
| Care Instructions | Hand Wash Only |
| Recommended Uses | Fighting |
| Size | 3.6" |
| Special Feature | Foldable |
| Special Features | Foldable |
| Style | Partially Serrated Edge |
| Warranty Description | Limited Lifetime, https://store.smith-wesson.com/warranty-info.html |
Listed on Amazon as: Smith & Wesson SWMP4LS 8.6in S.S. Assisted Folding Knife with 3.6in Serrated Clip Point Blade and Aluminum Handle for Outdoor Tactical Survival and EDC , Black
View on Amazon#4 · Emergency Features
4. MTech USA MT-A845BK
- Handle Material: Aluminum
- Blade Material: Stainless Steel
- Size: 3.8"
Best for: Emergency-feature pocket folder.
Why it ranks #4: Spring assistance supports rapid one-handed deployment, while the 3.75-inch blade is paired with a seatbelt cutter and glass breaker.
A spring-assisted 3.75-inch blade shares this MTech USA folder with a seatbelt cutter and glass breaker, giving emergency-focused buyers several functions in one knife. The thumb stud supports one-handed deployment, while a liner lock secures the blade open during use.
The black stainless-steel drop-point blade measures 3.75 inches and is 3.5 mm thick; its thumb stud complements the spring assist for deployment. A 5-inch closed length and pocket clip support carried storage, while the liner lock holds the blade open. The aluminum handle has a cut-out design. Together, the opening mechanism and emergency tools make this a utility-oriented option, though its listed 7.84-ounce weight is a consideration for all-day pocket carry.
- Spring-assisted one-handed deployment with thumb stud
- Liner lock secures the blade open
- Seatbelt cutter and glass breaker included
- 3.75-inch black stainless-steel drop-point blade
- At 7.84 ounces, it is a relatively heavy choice for pocket carry.
Skip it if you prioritize a lighter everyday folder; the Smith & Wesson Extreme Ops SWA24S weighs 3.5 ounces and has a pocket clip.
This fits buyers who want assisted opening plus a seatbelt cutter and glass breaker in a utility folder. Its 7.84-ounce listed weight and 5-inch closed length deserve consideration for compact, lightweight carry.
Full product details
| Brand | MTECH USA |
|---|---|
| Blade Length | 3.75 inches |
| Blade Material | Stainless Steel |
| Blade Shape | Drop Point |
| Blade Type | Drop Point |
| Color | Black Blade |
| Handle Material | Aluminum |
| Included Components | knife |
| Item Weight | 7.84 ounces |
| Manufacturer | Master Cutlery |
| Model | MT-A845BK |
| Model Number | MT-A845BK |
| Care Instructions | Hand Wash Only |
| Recommended Uses | Utility |
| Size | 3.8" |
| Special Feature | Foldable |
| Special Features | Foldable |
| Style | MT-A845 Series |
| Warranty Description | Limited |
Listed on Amazon as: MTech USA MT-A845BK SPRING ASSISTED KNIFE, 5" Closed, Black Blade
View on Amazon#5
5. Grand Way 6688
- Handle Material: Metal
- Blade Material: Stainless Steel
- Size: 3.5"
Best for: Tanto blade outdoor utility.
Why it ranks #5: This is explicitly spring-assisted rather than identified as automatic; its 3.54-inch 440 stainless-steel tanto blade is hardened to 60 HRC.
A 3.54-inch tanto blade made from 440 stainless steel and hardened to 60 HRC is the defining feature of the Grand Way 6688. Spring assist helps deploy it, while its liner lock holds the blade open for buyers carrying a folder for camping, hunting, or utility tasks.
The blade’s TI-NI coating and 440 stainless-steel construction accompany a metal-and-plastic handle and a liner lock. That lock provides a defined open-blade hold during work, while spring assist supports deployment. At 8.66 inches overall with a 5.12-inch handle, this is a full-size folder rather than a tiny pocket tool. The listed 7.76-ounce weight and pocket clip inform carry choices; hand-wash-only care is relevant after outdoor use.
- 3.54-inch 440 stainless-steel tanto blade
- Blade hardened to 60 HRC with TI-NI coating
- Spring-assisted opening and liner lock
- Pocket clip included for carry
- At 7.76 ounces, it may feel heavy for buyers prioritizing lightweight carry.
Skip it if you want a substantially lighter folder; the Smith & Wesson Extreme Ops SWA24S weighs 3.5 ounces and has a pocket clip.
The 6688 suits outdoor buyers who want a spring-assisted tanto folder with a liner lock and pocket clip. Its 7.76-ounce weight makes it a less suitable fit when low-weight pocket carry is the priority.
Full product details
| Brand | Grand Way |
|---|---|
| Blade Length | 3.54 inches |
| Blade Material | Stainless Steel |
| Blade Shape | Tanto Point |
| Blade Type | Tanto |
| Color | 2. ARMY GREEN |
| Handle Material | Metal |
| Included Components | Paracord Rope, Pocket Clip, Screwdriver |
| Item Weight | 7.76 ounces |
| Manufacturer | Grand Way |
| Model | 6688 |
| Model Number | 6688 |
| Care Instructions | Hand Wash Only |
| Recommended Uses | Bushcrafting, Camping, Emergency, Fighting, Fishing, Hiking, Hunting, Military, Survival, Tactical, Utility See more |
| Size | 3.5" |
| Special Feature | Foldable, Spring Assist |
| Special Features | Foldable, Spring Assist |
| Style | Modern |
#6
6. Smith & Wesson SWA24S
- Handle Material: Aluminum
- Blade Material: High Carbon Stainless Steel
- Size: 3.1"
Best for: Lightweight ambidextrous carry.
Why it ranks #6: It is a manual-style liner-lock folder with thumb knobs and a flipper, not an automatic; its 3.1-inch serrated blade makes it less suited to this search.
At 3.5 ounces, the Smith & Wesson Extreme Ops pairs a relatively light carry weight with ambidextrous thumb knobs and a finger flipper. Those opening options make it a useful fit for buyers seeking quick access from either hand, with a 3.1-inch partially serrated blade for utility tasks.
The 7.1-inch overall knife has a black aluminum handle, pocket clip, and liner lock, bringing carry, deployment, and open-blade security together in one compact folder. Its 7Cr17Mov high-carbon stainless-steel blade is partially serrated, giving the edge both plain and toothed sections. Handle jimping and finger indentions add contact points during use. The 3.1-inch blade and 3.5-ounce weight keep it suited to buyers prioritizing a lighter, shorter everyday-carry option.
- 3.5-ounce listed weight
- Ambidextrous thumb knobs and finger flipper
- Liner lock secures the open blade
- Partially serrated 3.1-inch 7Cr17Mov blade
- The 3.1-inch blade is shorter than the 3.75-inch blade on the MTech USA MT-A845BK.
Skip it if you want a longer blade and spring-assisted opening; the MTech USA MT-A845BK has a 3.75-inch blade and spring assist.
Choose this for lighter everyday carry where ambidextrous opening, a pocket clip, and a partially serrated edge matter. Its 3.1-inch blade is the boundary to weigh if your utility tasks call for more blade length.
Full product details
| Brand | Smith & Wesson |
|---|---|
| Blade Material | High Carbon Stainless Steel |
| Blade Shape | Clip Point |
| Blade Type | Serrated |
| Color | Black |
| Handle Material | Aluminum |
| Included Components | Knife |
| Item Weight | 3.52 ounces |
| Manufacturer | Taylor Brands LLC |
| Model | SWA24S |
| Model Number | SWA24S |
| Care Instructions | Hand Wash Only |
| Recommended Uses | Utility |
| Size | 3.1" |
| Special Feature | Lightweight |
| Special Features | Lightweight |
| Style | Box |
| Warranty Description | Limited Lifetime, https://store.smith-wesson.com/warranty-info.html |
| Wattage | 1 Milliwatts |
Listed on Amazon as: Smith & Wesson Accessories Extreme Ops SWA24S 7.1in S.S. Folding Knife with 3.1in Serrated Clip Point Blade and Aluminum Handle for Outdoor, Tactical, Survival and EDC
View on AmazonAutomatic, OTF, and assisted opening are not the same
A fast-opening or spring-assisted knife is not automatically the same mechanism as a push-button automatic or an OTF. In this lineup, the Smith & Wesson MPOTF10 is identified by its OTF model name, and the Generic Push Button Knife names a push-button lock, but neither listing fully explains its deployment operation. The Smith & Wesson SWMP4LS and MTech USA MT-A845BK explicitly describe assisted opening; the Grand Way 6688 is also labeled spring-assisted.
The Smith & Wesson SWA24S instead lists a flipper and ambidextrous thumb knobs with a liner lock. That distinction matters because a buyer searching specifically for an automatic may otherwise select a folder that still requires manual initiation.
Before ordering, confirm how the blade deploys, whether the lock is a deployment control or only a blade-retention feature, and whether the knife’s mechanism is permitted where you intend to carry it.
Check deployed length, not just the handle in your pocket
A knife’s closed or handle length alone does not show how much blade it presents when open. The supplied listings give overall lengths for several models, but not a consistent closed-length measurement across all six, so do not compare their carry dimensions as if they were measured the same way. For example, the Smith & Wesson MPOTF10 lists a 3.5-inch blade and 5.16-inch handle, while the Smith & Wesson SWMP4LS lists a 3.6-inch blade and 8.6-inch overall length.
The MTech USA MT-A845BK gives a 5-inch closed length and a 3.75-inch blade, a useful pair of separate measurements. The Generic Push Button Knife lists a 17-centimeter overall length and a 7-centimeter blade.
Check the maker’s full dimensional details and your preferred pocket position before assuming a clip or handle will carry comfortably.
How to Choose an Auto Folding Knife
Opening mechanism
Choose by the actual deployment mechanism, not just a fast-opening description. The Smith & Wesson MPOTF10 is identified as OTF, while the Generic Push Button Knife names a push-button lock. The Smith & Wesson SWMP4LS and MTech USA MT-A845BK state spring-assisted opening; the Grand Way 6688 also lists spring assist.
The Smith & Wesson SWA24S uses a flipper and thumb knobs with a liner lock. If automatic-style operation is the priority, start with the OTF or push-button listings and verify their controls.
If you are willing to manually initiate a spring-assisted blade, the assisted models offer clearly stated opening features. The product descriptions do not establish a complete comparison of deployment speed or operation.
Blade length and edge
Match blade size and edge style to the tasks you expect rather than assuming longer is always better. Listed blades range from 3.1 inches on the Smith & Wesson SWA24S to 3.75 inches on the MTech USA MT-A845BK; the Smith & Wesson MPOTF10 is 3.5 inches. Serrated options include the MPOTF10, SWMP4LS, and SWA24S, while the Generic Push Button Knife has a reverse-tanto blade.
A longer blade may appeal when reach and cutting length matter, so consider the MTech or SWMP4LS. Buyers preferring a shorter listed blade can consider the SWA24S, though its manual-style opening makes it a weaker fit for this keyword.
Weight and handle material
Consider the listed weight and handle construction together, especially if the knife will be carried often. The Smith & Wesson SWA24S is listed at 3.5 ounces, compared with 7.6 ounces for the SWMP4LS and 7.84 ounces for the MTech USA MT-A845BK. Aluminum handles appear on several models; the Grand Way 6688 lists metal and plastic, while the Generic Push Button Knife specifies T6 aviation aluminum.
Lighter carry may favor the SWA24S, but its opening style is not automatic. Those prioritizing an OTF-style model can look at the MPOTF10, listed at 5.6 ounces in its specifications.
Weight figures are not presented consistently, so compare the model’s full listing before making a close carry-weight decision.
Which Auto Folding Knife Should You Choose?
Choose the Smith & Wesson MPOTF10 if an OTF-labeled model is your priority and its 3.5-inch blade, safety lock, and glass breaker suit your needs. The Generic Push Button Knife is the alternative to investigate if you prefer a push-button design and a compact 7-centimeter blade, but confirm exactly how its lock and deployment operate. For spring-assisted opening, the Smith & Wesson SWMP4LS offers a 3.6-inch partially serrated blade, while the MTech USA MT-A845BK adds a seatbelt cutter and glass breaker.
The Grand Way 6688 is another assisted option with a 3.54-inch tanto blade. Choose the Smith & Wesson SWA24S only if a flipper-and-thumb-knob folder meets your needs; it is the least direct match for an automatic-knife search.
Frequently Asked Questions
How can I tell whether a knife is automatic, OTF, or merely spring-assisted?
Check the stated mechanism and how the blade deploys. An OTF knife’s blade travels out of the handle; an automatic knife deploys by a control that releases the blade. A spring-assisted folder is opened manually before its spring helps finish deployment.
Listings can be unclear, so verify the mechanism rather than relying on “tactical” or “assisted” wording.
What should I check about local rules before carrying an automatic or assisted knife?
Check the laws that apply where you live, travel, and plan to carry the knife. Rules may distinguish automatic, assisted, and other folding knives, and may address blade length, carry location, or restricted places. Confirm current requirements with an official local source; a product listing cannot establish whether carrying a particular knife is lawful.
How should I clean and maintain a folding knife’s blade, lock, and opening mechanism?
Wipe the blade clean and dry after use, and remove debris from the pivot and lock area without forcing the mechanism. Follow the manufacturer’s care instructions for lubrication and adjustment. Check that the blade opens, closes, and locks as intended before use; stop carrying it if the lock or opening mechanism feels loose or unreliable.
Which features should I compare when choosing among these folders?
Compare the stated blade shape and length, edge style, handle material, and listed safety or utility features against your intended use. For example, the listings include serrated and tanto blades, aluminum handles, and, on some models, a safety lock or glass breaker. Do not assume a feature is present unless the specific listing identifies it.
What should I verify when a listing gives little detail about deployment?
Confirm the exact opening control, lock operation, and whether the knife is automatic, OTF, or spring-assisted before choosing it. The Smith & Wesson MPOTF10 listing identifies it as OTF, but its deployment control is not explained in the supplied details. Ask the seller or consult product documentation rather than inferring how it operates.
Final Words
For the closest stated match to an automatic-knife search, start with the Smith & Wesson MPOTF10 Serrated Grey: its name identifies it as OTF, and its listed blade, safety lock, and glass breaker may suit your needs. Verify its deployment control first. Consider the push-button model or assisted folders if those mechanisms fit your preference, and choose the SWA24S only if a flipper-and-thumb-knob folder is what you want.
