The Trinity Force SBA Spring (Silent Buffer Assembly) is a drop-in recoil system designed to help the AR-15 platform function more smoothly and quieter. The carefully balanced, all-in-one system is easy to install and quickly reduces friction and vibration with much smoother harmonics than traditional buffer systems.

  • Fits M4 style buffer tubes for AR-15 semi-automatic rifles

  • Length: 7.25″

  • Weight: 6 oz