The Trinity Force .308 SBA (Silent Buffer Assembly) is a drop-in recoil system built to smooth out the AR-10 platform. Traditional carbine buffers ping and rattle inside the tube; the SBA replaces the standard buffer and spring with a self-contained captured system, so you get quieter cycling, less felt vibration, and cleaner harmonics on every shot. Specs and features: Fits carbine-length AR-10 / .308 / large-frame semi-automatic buffer tubes Compatible with A2 rifle-length tubes when used with an A1/A2 spacer adapter (sold separately) All-in-one captured recoil system - buffer, spring, and guide combined High-strength aluminum body with heat-treated steel internals Reduced noise vs. a traditional buffer + spring stack Smoother recoil impulse and less felt bolt bounce Drop-in install - no gunsmithing, no permanent modification Compatibility: intended for DPMS-pattern and other standard AR-10 / .308 lower receivers running a carbine-length receiver extension. Not for AR-15 / 5.56 platforms. Verify your rifle uses a standard AR-10 buffer tube ID before ordering; some large-frame clones use proprietary spec tubes.