Gas Blowback Rifle Conversion Kit- Angry Gun, HAO, Maddog, kaj RA TECH provizas la specon de Konvertiĝa ilaro kiel la HK416D-ilaro, John Wick M4 Rifle Kit, Noveske N4 Rifle Kit.
Just settle for the guarder version, the trigger bars come warped and I had to donate my tm bars and the trigger itself varies. One works fine and the other one is too large. avoid