Piston Compatible Barrel Nut JohnnyWalker The 4-panel construction helps to

The 4-panel construction helps to maintain shape

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Piston Compatible Barrel Nut JohnnyWalker The 4-panel construction helps toNewly manufactured. This new version is lighter than the original nut (1. 4oz vs 4. 5oz) and is made of T60 61 Aluminum. This proprietary PATENTED barrel nut is compatible with the Adams Arms piston system among many others. If used with the XLP Piston Block from Adams Arms, there is no need to remove the hand guard to adjust the piston. Just insert a small Allen Wrench or plastic stylus (not included) into one of the holes on the rail that lines up