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. READ MORE
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AT3™
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 -
AT3™
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™
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 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 -
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™
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™
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 -
NEW
Bravo Company Gunfighter MOD0 SOPMOD Stock Kit – Includes all Receiver Extension/Buffer Parts
Bravo Company Gunfighter MOD0 SOPMOD Stock Kit Bravo Company's BCMGUNFIGHTER Stock Assembly Mod 0 SOPMOD is a Mil-Spec receiver extension kit that includes a locking nut M4, Mil-Spec carbine action...2 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 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™
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... -
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 -
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 -
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 -
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... -
Magpul ASAP Ambidextrous Sling Attachment Point QD Endplate
A Functional Replacement For AR15/M4 Carbine Stock Receiver Endplate The Magpul Quick Detach Ambidextrous Sling Attachment Point is designed to replace the standard AR15/M4 carbine stock receiver endplate. It provides... -
Aero Precision Enhanced AR-15 Carbine Buffer Kit
Enhanced Buffer Tube Kit for Easy Assembly and More Aero Precision's enhanced buffer tube offers numerous upgrades over standard mil-spec style kits. For starters, the buffer tube makes assembling to... -
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... -
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... -
Luth-AR AR-15 Carbine Buffer Spring
Luth-AR Carbine Buffer Spring for AR-15 This AR-15 buffer spring from Luth-AR is a perfect replacement for a worn-out recoil spring in a well-used rifle. This spring drops into standard... -
Aero Precision AR-15/AR-10 Enhanced Carbine Buffer Tube
Aero Precision Enhanced AR-15 Buffer Tube The new Aero Precision Enhanced buffer tube offers numerous improvements over older style buffer tubes. While these tubes retain mil-spec dimensions to accept a...3 Options -
LBE Unlimited Ambidextrous Sling Mount Receiver End Plate
LBE Unlimited Ambidextrous End Plate The LBE Unlimited ARAMEPL is an ambidextrous end plate designed for the AR 15 rifle. It comes equipped with sling loops, allowing the user to...
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
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