BGA ATC-4 Polar Star Fusion Engine Gen 1 Serial #0007. NO TRADES. Bowling Green Airsoft history right here. I’m second owner. First one bought if from BGA in this configuration with the FE Gen 1. Has Prowin Hop. S-hop barrel. Cool pistol grip thingy too. Dust cover spring has been flipped so you just pull down on it to get to hop chamber. The charging handle is not functional. It’s just snapped in its place. Has a Madbull Dragon Fire Hand guard. Magpull knock off AFG. Some version of a speed trigger. SAFETY DOES NOT WORK. The speed trigger is set to be very sensitive so any pull fires. The FCU is in semi mode. It’s an old version FCU and I cannot recall how to get it back to semi/FA. Lower has been tapped to allow nozzle alignment of the FE in the lower. Great CQB gun and holds its own on the field too. It was my first HPA and it will be missed.