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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- Buffer Tube Parts - Luth-AR (12)
- Buffer Tube Parts - LBE Unlimited (10)
- Buffer Tube Parts - AT3 Tactical (10)
- Buffer Tube Parts - Armaspec (6)
- Buffer Tube Parts - JP Enterprises (5)
- Buffer Tube Parts - UTG (4)
- Buffer Tube Parts - Odin Works (4)
- Buffer Tube Parts - Geissele (4)
- Buffer Parts - Fortis (4)
- Buffer Tube Parts - Bravo Company (4)
- 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 - Strike Industries (2)
- Buffer Tube Parts - Spike's Tactical (2)
- Buffer Parts - KE Arms (2)
- Buffer Tube Parts - Yankee Hill Machine (1)
- Buffer Tube Parts - Timber Creek Outdoors (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 - Magpul Industries (1)
- Buffer Tube Parts - Black (18)
- Receiver Extension Buffer Parts - Stainless (16)
- Buffer Tube Parts - Red (10)
- Buffer Tube Parts - Flat Dark Earth (9)
- Buffer Tube Parts - Gray (8)
- Buffer Tube Parts - Blue (7)
- Buffer Tube Parts - OD Green (7)
- Buffer Tube Parts - Burnt Bronze (5)
- Buffer Parts - Tungsten (5)
- Buffer Tube Parts - Pink (4)
- Buffer Tube Parts - Titanium (4)
- Buffer Tube Parts - Brown (3)
- Buffer Tube Parts - Purple (1)
AT3™ Castle Nut for AR-15 Buffer Tubes – 10 Colors AvailableSecure 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 Options10 Options10 Options
AT3™ Mil Spec End Plate for AR-15 – 10 Colors AvailableMil-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 Options10 Options10 Options
Armaspec Stealth Recoil Spring (SRS) for AR-15 | Multiple Buffer WeightsReduce 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 Options7 Options7 Options
AT3™ Mil Spec AR-15 Buffer Tube – 10 Colors AvailableMil-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 Options10 Options10 Options
AT3™ Carbine Buffer Spring for AR-15Carbine 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™ Mil Spec Buffer Tube Kit For AR-15 – 10 Colors AvailableThe 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 Options10 Options10 Options
AT3 Tactical AR-15 Heavy Buffers – H1, H2, and H3 BuffersTune 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 Options3 Options3 Options
Armaspec Sound Mitigation Buffer (SMB) Captured Gen 3 – Multiple Buffer Weights AvailableImproved & 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 Options6 Options6 Options
AT3™ Carbine Buffer (3.0 oz) for AR-15Standard 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 Tube7075 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 Options7 Options7 Options
UTG Pro Mil-Spec AR 15 Buffer Tube 6-Position Receiver ExtensionSuperior 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 Options5 Options5 Options
UTG Pro Six Position Mil-spec AR 15 Buffer Tube KitComplete 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 Options2 Options2 Options
Sylvan Arms AR-15/AR-9 Folding Stock Adapter Gen 3 – ARH300An 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...
Aero Precision Enhanced AR-15 Carbine Buffer KitEnhanced 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 – HeavyHeavy 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...
Luth-AR AR-15 Carbine Buffer SpringLuth-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...
Armaspec A1/A2 Buffer Adapter for Stealth Recoil SpringA 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...
AT3 Tactical Flat Wire AR-15 Buffer SpringImprove 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...
Battle Arms Development AR-15 BuffersBattle Arms Development AR-15 Buffers - Carbine and Heavy Battle Arms Development provides high quality US made recoil buffers for your AR-15. These buffers come in a range of weights,...4 Options4 Options4 Options
LBE Unlimited Ambidextrous End PlateLBE Unlimited ARAMEPL AR 15 Ambidextrous End Plate Sling Loops Steel Phosphate FinishBlack
Fortis K1 Enhanced End Plate with Tapered Castle Nut for AR 15Lightweight AR-15 Castle Nut and Endplate with Friction Fit Fortis created the two-piece K1 system to eliminate the risk of the castle nut backing out, while maintaining light weight. The...7 Options7 Options7 Options
Aero Precision Enhanced AR-10 Carbine Buffer KitAR-10 Enhanced Mil-Spec Buffer Tube Kit This enhanced buffer kit for AR-10 style rifles offer some great features over a standard carbine buffer kit. The enhanced buffer tube keeps things...
Armaspec Braided AR-15 Buffer Spring – BBSBraided Buffer Spring for Standard AR-15 Buffers Armaspec's Braided Buffer Spring (BBS) brings better long-term performance and reliability than a standard carbine spring. The BBS's three strand design features 51...
Luth-AR .308 Carbine Buffer Spring for AR-10/LR308 Rifles.308 Buffer Spring for AR-10 Style Rifles An important thing to note when you're building an AR-10 is that your buffer spring is not interchangeable with an AR-15. .308 buffer...
Other Lower Receiver Components for AR 15:
AR 15 Buffer Tube Parts (Receiver Extension)
Lower Parts Kit for AR-15
Magazines & Parts