This is my ground up Build that I’ve put a lot of money and time into, but yet never fielded, here’s the specs; Airsoft m4 build- Internals- Modify Gearbox (60) Guarder spring (18) Matrix shim set (5) Lonex selector plate (10) SHS Piston (12) Lonex Piston Head (20) Asg moater (60) Titan Mosfet (182) Krytac outer barrel (90) Bucking(16) ProWin HopUp (29) Siegtek gears (125) Lonex cylinder (18) Lonex cylinder head (12) Modify ball bearings (20) Modify Anti reversal latch (12) Total Internal=$689 Externals- Trigger (18) Selector Switch(18) Magazine Catch(18) Krytac stock(45) Sight(90) G&P body (160) Krytac orange tip (5) Krytac 13in rail (125) Bolt stop(5) Krytac Buffer tube (35) Krytac charging handle (15) Dust cover(5) Krytac sling adapter(10) Krytac Outer barrel(55) Pistol grip (12) Noveske amplifier (45) Krytac stock sights (50)or magpul flip up sights Total=752 Airsoft Extreme service(80) All total-=$1,521 Will look at other guns and or money but will negotiate price because that’s a hell of a price 😂 so dm me