Kwa qrf mod 1 shell only this gun had a polarstar kythera, I only bought this for the engine, so what you see is what you get  this would be a good build for a hpa system ie: wolverine inferno, polarstar jack etc, so anything with an fcu and trigger board, it's got the kwa gearbox that's been modified  to take a hpa engine and the lower has been modified to take a cnc hop unit, if you're going to use a different hop unit other than the standard kwa you will have to take 2mm of the feed tube, so that the mag cach works or just order a kwa qrf mod1 original hop unit, i will include an ak wolverine inferno nozzle for wolverine hpa build and yes the mags are include 4x 80 rnd £100 that includes PayPal and post