Nefarious Arms

Nefarious Arms HK G36/SL8/HK 416/MR556 Gas Piston A great spare, upgrade, or replacement part for your HK. Includes 3 piston rings for a complete drop in replacement part. TiN coated gold for added...

Nefarious Arms HK 416/MR556 10.4" A3 Barrel Chrome-lined and made in the USA.  Grab this expertly crafted barrel for your next SBR or pistol build.   

Nefarious Arms HK 416 Gas Block Assembly Tool   A Nefarious Arms creation for those that like to service or replace thier 416 gas block. This assembly tool will effortlessly help you assemble or...

Nefarious Arms - Reaction Rod - HK 416  The Nefarious Arms H&K 416 Reaction Rod is used to securely hold the upper receiver in a bench vise so that work may be performed on the muzzle device...

Nefarious Arms - NAS HK 416 Adjustable Gas Block This is a user configurable 2 position adjustable gas block that can be installed on 11″ – 20″ A1 barrels. Each gas block ships with...