Guntec USA AR-10 A2 Buffer Tube w/ Buffer & Spring

The Guntec USA AR-10 A2 Buffer Tube Kit is a complete rear-stock assembly purpose-built for AR-10 rifles chambered in .308 Winchester / 7.62x51mm NATO. The kit uses the classic fixed-stock A2-style rifle buffer tube, the longer non-collapsible pattern designed to mount traditional A2 buttstocks, and pairs it with a .308 carbine buffer and action spring.

The A2 buffer tube is dimensionally longer than the modern collapsible Mil-Spec carbine tube and only accepts fixed or A2-pattern buttstocks, making this kit a direct drop-in for AR-10 builders running a classic fixed rifle stock. The shorter CAR-style buffer is tuned for .308 carriers so the action cycles reliably.

The tube is machined from lightweight aluminum to keep overall rifle weight down while providing the strength needed at the receiver extension. Everything needed to install is included - A2 buffer tube, .308 short buffer, and action spring - so there is no need to source components separately for your AR-10 build or rebuild.