AR-15 Buffer Tube Parts
Various sets and individual items that make up the receiver extension are all here on AT3.
The buffer tube, spring, buffer, castle nut, and the locking ring are all available for the milspec or the commercial variants.
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- Buffer Tube Parts - Luth-AR (13)
- Buffer Tube Parts - LBE Unlimited (13)
- Buffer Tube Parts - Strike Industries (12)
- Buffer Tube Parts - AT3 Tactical (10)
- Buffer Tube Parts - Bravo Company (6)
- Buffer Tube Parts - Armaspec (6)
- Buffer Tube Parts - Odin Works (5)
- Buffer Tube Parts - JP Enterprises (5)
- Buffer Tube Parts - UTG (4)
- Receiver Extension Buffer Parts - Kaw Valley Precision (4)
- Buffer Tube Parts - Geissele (4)
- Buffer Parts - Fortis (4)
- Buffer Tube Parts - Spike's Tactical (3)
- Buffer Tube Parts - Midwest Industries (3)
- Buffer Tube Parts - Angstadt Arms (3)
- Buffer Tube Parts - Aero Precision (3)
- Buffer Tube Parts - VLTOR Weapon Systems (2)
- Buffer Tube Parts - Timber Creek Outdoors (2)
- Buffer Parts - KE Arms (2)
- Buffer Tube Parts - KAK Industry (2)
- Buffer Tube Parts - Yankee Hill Machine (1)
- Buffer Tube Parts - Sylvan Arms (1)
- Buffer Tube Parts - Radian Weapons (1)
- Buffer Parts - Phase 5 (1)
- Buffer Tube Parts - LANTAC USA (1)
- Buffer Tube Parts - Double Star USA (1)
- Buffer Tube Parts - CMMG (1)
- Buffer Tube Parts - Battle Arms Development (1)
- Buffer Tube Parts - ATI (1)
- Buffer Tube Parts - Magpul Industries (1)
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- Buffer Tube Parts - Black (37)
- Receiver Extension Buffer Parts - Stainless (19)
- Buffer Tube Parts - Flat Dark Earth (17)
- Buffer Tube Parts - Red (15)
- Buffer Tube Parts - Blue (11)
- Buffer Tube Parts - Gray (9)
- Buffer Tube Parts - OD Green (9)
- Buffer Parts - Tungsten (6)
- Buffer Tube Parts - Burnt Bronze (5)
- Buffer Tube Parts - Pink (4)
- Buffer Tube Parts - Titanium (4)
- Buffer Tube Parts - Brown (3)
- Buffer Tube Parts - Purple (2)
- Receiver Extension Buffer Parts - Tan (1)
- Buffer Tube Parts - Gold (1)
- Buffer Tube Parts - Silver (1)
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AT3™Sale!
AT3™ Tactical H2 Buffer (4.6 oz) for AR-15
The Best Fix for an Overgassed AR - H2 Carbine Buffer Weight This one-piece buffer weight with rubber head weighs in at 4.6 oz, and is ideal for improving recoil... -
AT3™Sale!
AT3™ Carbine Buffer Spring for AR-15
Carbine Buffer Spring for 6-Position Adjustable Buffer Tubes This spring will fit in any carbine-length buffer tube to complete your AR15 buffer system. This piece is ideal for repairing a... -
AT3™Sale!
AT3™ Castle Nut for AR-15 Buffer Tubes – 10 Colors Available
Secure Your AR15 Buffer Assembly with a Steel Castle Nut This steel castle nut is an essential piece of an AR15 buffer tube/stock assembly. With standard cuts for use with...10 Options -
10% Off!
Strike Industries Optimus Adjustable Weight AR-15 Buffer
Optimus Modular Weight Buffer Unleash the full potential of your AR platform with the Strike Industries Optimus Modular Weight Buffer. Developed for performance-driven shooters, this innovative buffer system allows for... -
10% Off!
Strike Industries AR-15 Flat Wire Buffer Spring
AR Carbine Flat Wire Buffer Spring Elevate the performance and longevity of your AR's carbine buffer system with the Strike Industries AR-15 Flat Wire Buffer Spring. This premium upgrade delivers... -
10% Off!
Strike Industries AR-10 Flat Wire Buffer Spring
Strike Industries AR-10 Flat Wire Buffer Spring Enhance the performance and longevity of your .308 AR system with the Strike Industries Flat Wire Buffer Spring. This premium upgrade smooths out... -
10% Off!
Strike Industries PDW AR-15 Buffer
Strike Industries AR PDW 9mm Buffer Configure your Strike Industries PDW stock/stabilizer or other pistol-length AR setups to reliably run 9mm direct blowback systems with the Strike Industries AR PDW... -
AT3™Sale!
AT3™ Carbine Buffer (3.0 oz) for AR-15
Standard Carbine Buffer Weight for AR15 This one-piece carbine buffer weight with rubber head weighs in at 3.0 oz, standard weight for AR15 buffers. This is typically the ideal weight... -
AT3™Sale!
AT3 Tactical Flat Wire AR-15 Buffer Spring
Improve Your AR-15's Recoil with a Flat Wire Buffer Spring Made in the USA with cryo-treated 17-7 stainless steel, this flat wire recoil spring drops into your buffer tube to... -
AT3™Sale!
AT3™ Mil Spec End Plate for AR-15 – 10 Colors Available
Mil-Spec Steel Endplate for AR15 Lower Receivers This standard endplate is compatible with any mil-spec AR15 lower receiver. Perfect for completing a build that might be missing this component, or...10 Options -
AT3™Sale!
AT3™ Mil Spec AR-15 Buffer Tube – 10 Colors Available
Mil-Spec AR-15 Carbine Buffer Tube Made 6061-T6 aluminum construction with a black anodized finish, with six precision-machined notches to securely lock your stock into position. This buffer tube has a...10 Options -
RECOMMENDED
Armaspec Stealth Recoil Spring (SRS) for AR-15 and AR-10
Reduce Recoil, Wear, and Unwanted Rattling Armaspec's Stealth Recoil Spring™ is one of the best upgrades for your AR15 or AR10 recoil system, and you can feel and hear the...8 Options -
AT3™Sale!
AT3™ Mil Spec Buffer Tube Kit For AR-15 – 10 Colors Available
The perfect kit for your next build - at a price that can't be beat. This Mil-Spec AR-15 Buffer Tube Kit includes the buffer tube, castle nut, lock plate, 3oz...10 Options -
Armaspec Sound Mitigation Buffer (SMB) Captured Gen 3 – Multiple Buffer Weights Available
Improved & Easy-To-Install Captive Buffer Weights For AR Builds The Armaspec Sound Mitigation Buffer (SMB) Captured Gen 3 is a quick and easy replacement for your standard buffer and spring....6 Options -
AT3™RECOMMENDEDSale!
AT3 Tactical AR-15 Heavy Buffers – H1, H2, and H3 Buffers
Tune Your Overgassed AR-15 with Recoil-Reducing Heavy Buffers If your rifle is throwing brass forward and recoiling sharply, you've likely got too much gas in your recoil system. Most commercially...3 Options -
10% Off!
Strike Industries Picatinny Stock Adapter for Bufferless AR-15
Versatile Picatinny Stock Adapter The Strike AR Picatinny Stock Adapter opens up a new world of customization for your AR platform. Easily mount folding stocks, stabilizers, and other accessories thanks...3 Options -
10% Off!
Strike Industries V2 Enhanced AR-15 Castle Nut with Extended QD Endplate
TRIBUS Enhanced Anti-Rotation Castle Nut & Extended End Plate Introducing the TRIBUS Enhanced Anti-Rotation Castle Nut & Extended End Plate, a dynamic duo for your AR-15. With three QD mounting...4 Options -
10% Off!
Strike Industries Enhanced AR-15 Castle Nut with Extended QD Endplate
Elevate Your AR-15 with Strike Industries' Enhanced Castle Nut and End Plate The Strike Industries Enhanced Castle Nut and Extended End Plate combo represent a step above the generic parts...4 Options -
10% Off!
Strike Industries Multi-Function End Plate with Anti-Rotation Castle Nut
Strike Industries Multi-Function End Plate with Anti-Rotation Castle Nut The SI Multi-Function End Plate and Anti-Rotation Castle Nut are designed to update and upgrade the often neglected castle nut and...2 Options -
10% Off!
Strike Industries Short AR Pistol Buffer Tube Kit
Compact Power: Strike Industries Pistol Buffer Tube The Strike Industries Pistol Buffer Tube delivers enhanced functionality and reduced overall length for your AR-style pistol or personal defense weapon. Machined from...4 Options -
10% Off!
Strike Industries AR Carbine Length Pistol Buffer Tube
Elevate Your PDW Build: Strike Industries Carbine Length Pistol Buffer Tube Crafted from robust 7075-T6 aluminum, this buffer tube offers a major upgrade over standard 6061 models. Featuring a supported,...4 Options -
Timber Creek Outdoors Mil-Spec AR 15 Buffer Tube
7075 Aluminum Buffer Tubes Finished in Durable Cerakote Timber Creek Outdoors shows us once again what you get when you combine great US-made components with a visual pop that lasts. ...7 Options -
UTG Pro Mil-Spec AR 15 Buffer Tube 6-Position Receiver Extension
Superior Quality Mil-Spec Buffer Tube - Unbeatable Value The UTG Pro 6-position Mil-Spec receiver extension is precision machined from 6061 T6 aluminum forgings to true Mil-Spec dimensions. Provides a solid...5 Options -
Timber Creek Outdoors QD End Plate – QD-EP for AR 15
Ambidextrous Attachment for Slings Timber Creek's QD End Plate is an upgrade for your standard AR15 end plate, providing a place for Quick Detach Sling Swivels at the rear of...8 Options
Other Lower Receiver Components for AR 15:
AR 15 Buffer Tube Parts (Receiver Extension)
AR-15 Triggers
Buttstocks
Lower Parts Kit for AR-15
Magazines & Parts
Pistol Grips
AR-15 Trigger Guards