This sniper rifle is upgraded with a 170 spring tune up kit from angel custom and has a angel custom tight bore inner barrel 6.01mm with stock spacers also installed is maple leaf hop up bucking 2 mags and an illuminated scope green and red sights custom painted myself there is a stock spring spring guide 2 back up Sears 1 stock sear and 1 Cnc speed sear also with an extra cylinder and a mad bull hop bucking with the stock inner barrel all for 160 or open to trades more then 150 put into this gun I have 3 sniper rifles and I'm upgrade building a L96 the echo 1 m28 is shooting at 550 with .20 gram bbs I use .32 or .40 gram bbs shoots at far I preferred r hopping this gun for maximum long distance but it's a bad ass gun just needs regreased I have 3 snipers and 1 upgraded l96 and building the other