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AT3™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™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
AT3™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™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
AT3™Finish Off Your New Rifle Lower with an Enhanced Trigger and Matching Magpul Furniture Your AR lower has some of the most critical parts you don't want to skimp on...4 Options
AT3™Finish Your New Pistol Lower the Right Way - In the Color You Want! Have a vision for completing your next AR lower? Want to save a little cash without...4 Options
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