AR 15 Buffer Tube Parts (Receiver Extension)
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. READ MORE
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AT3™
AT3™ Castle Nut for AR-15 Buffer Tubes – 7 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...7 Options -
AT3™
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™
AT3™ Mil Spec End Plate for AR-15 – 7 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...7 Options -
Armaspec Stealth AR 15 Recoil Spring (Armaspec SRS) | Multiple Buffer Weights
Reduce Recoil, Wear, and Unwanted Rattling Armaspec's Stealth Recoil Spring™ is one of the best upgrades for your AR15's recoil system, and you can feel and hear the difference instantly. ...7 Options -
AT3™
AT3™ Mil Spec Buffer Tube – AR-15
This 6-Position AR-15 Mil-Spec buffer tube is perfect for your next AR-15 build, or as an upgrade on existing commercial-spec tube. Made 6061-T6 aluminum construction with a black anodized finish,...7 Options -
AT3™
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... -
Spike’s Tactical Tungsten AR 15 Buffer
The Highest Performing Buffer on the Market - Eliminates Bolt Bounce, Controls Muzzle Rise, Cuts Down Felt Recoil and Overall Noise The Buffer that offers the best performance at a...3 Options -
AT3™
AT3™ Mil Spec Buffer Tube Kit For AR-15 – 7 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...7 Options -
New
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 -
New
LBE Unlimited AR-15 Mil-Spec Buffer Tube
LBE Mil-Spec AR-15 Buffer Tube A high quality, US-made buffer tube is a crucial component for a rifle that can stand up to wear and tear. This mil-spec AR-15 buffer...4 Options -
AT3™
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... -
New
Luth-AR Rifle Buffer Spring for A1/A2 AR-15 Receiver Extensions
Rifle Buffer Spring for Fixed Stock AR-15 This rifle length recoil spring is a perfect replacement part for a worn-out recoil spring in an A1 or A2 style fixed stock... -
New
BCM MK2 Buffer Weight for MK2 AR-15 Receiver Extensions
Bravo Company MK2 Buffer with 4 Sliding Weights The Bravo Company MK2 Buffer weight for their specialized MK2 Receiver Extension is an upgrade over standard AR-15 buffers. Each buffer contains...5 Options -
New
BCM MK2 Receiver Extension for AR-15
8 Position AR-15 Buffer Tube for MK2 Recoil System BCM's MK2 Receiver Extension is an upgrade to the standard carbine recoil assembly, that uses a specialized buffer weight. This receiver... -
New
BCM MK2 Recoil Mitigation System Mod1 for AR-15
Recoil Reducing AR-15 Buffer Kit Bravo Company's MK2 Recoil Mitigation System effectively reduces recoil with a few changes to key components. This kit uses a longer, 8 position buffer tube,...3 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 -
Sylvan Arms AR-15/AR-9 Folding Stock Adapter Gen 3 – ARH300
An Innovative Tool To Transform Your AR-15/AR-9 Into A Folding Rifle The Sylvan Arms AR-15/AR-9 Folding Stock Adapter Gen 3 - ARH300 is an innovative accessory that will allow shooters... -
UTG Pro Six Position Mil-spec AR 15 Buffer Tube Kit
Complete UTG Buffer Assembly - Add Your Own Stock This receiver extension kit from UTG comes with a buffer tube, buffer spring, 3.0 oz carbine buffer, castle nut, and endplate. ...2 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 -
AT3™
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 -
Armaspec A1/A2 Buffer Adapter for Stealth Recoil Spring
A Simple Drop-In Solution for using the Stealth Recoil Spring in a Fixed Stock If you have a fixed stock and rifle-length buffer assembly, you're probably short on options for... -
Odin Works Adjustable AR-15 Buffer Weight – Heavy
Heavy Steel Buffer for Overgassed or Blowback AR15 In the world of AR15s, you may have a specialized firearm that requires a specifically tuned gas system. Especially for rifles that... -
AT3™
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... -
LBE Unlimited Ambidextrous End Plate
LBE Unlimited ARAMEPL AR 15 Ambidextrous End Plate Sling Loops Steel Phosphate FinishBlack
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
