KNS Adjustable gas piston for RPK-74

[MiniArt]

Just want to say this thing works great. Have an over gassed RPK-74. It threw the empties to the next county over. After installing this device recoil is less violent and empties go 15-20' Rarely do aftermarket gadgets live up to the sales hype. But this one did better then expected. So easy to install and adjust.