Maxim Defense Industries Heavy Buffer, JP Silent Capture Spring, AR-15, Only Fits Maxim's CQB Stock, Black MXM-47571 MXM47571

The JP Silent Captured Spring Systems are manufactured exclusively for Maxim Defense Industries to work with the Maxim Defense CQB Stock System. Choose from the standard/carbine weight heavy weight and 9mm weight Silent Captured Spring Systems. The JP Silent Captured Spring Systems require an open channel in your bolt carrier group assembly for the guide rod to pass during fire.