This is my brand new HK 416 GBBR. it currently has a power bolt which increases the fps and range big time. Also it has a NPAS system installed to allow for more efficient gas use. it is upgraded with all RA-Tech parts except the bolt. This gun is only a week old and each mag has only been used once. I am considering trades. I am looking for high end AEGs such as G&P Defender, Sentry, Mk18, Block II, SR10, MK110, CTW, Polar Star Fusion engine. pm me if you have something you think I might would like to trade for .