Brownells BRN-4 HK416 Compatible Piston Rod Assembly

The Brownells BRN-4 Piston Rod Assembly is specifically designed for HK416 and MR556 rifle systems. This essential component provides reliable gas operation for rifle builds or replacement needs. Compatible with Heckler & Koch MR556 and other HK416-pattern rifles, ensuring proper cycling and optimal performance. Quality manufactured by Brownells for dependable function.