Originally designed for military use, this recoil buffer replaces the standard recoil spring buffer found in AR15 rifles.  This buffer is air-charged and tested to extremes without failure. Because it’s air-charged there are no messy leaks commonly found in similar hydraulic products which have historically failed over time. Widely used for CMP and hi-power rifles because the AC4 reduces felt recoil and muzzle climb providing reliability during matches.

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Quick and simple installation. No tools required. To install the AC4 Pneumatic buffer, first release the rear takedown pin and pivot the rifle open. Then depress the buffer stop pin and remove your spring buffer. Next insert the AC4 Pneumatic buffer and lock it in place by pushing it behind the buffer stop pin. Finally pivot the rifle closed and lock the rear takedown pin.

New non-adjustable model. The new non-adjustable model now works for both .223/5.56 as well as pistol cal models.  Refer to our most current installation instructions!  The buffer must be installed differently if you are using pistol cal.