Action Army AAP01 GBB Part - Rotary Hop Up Chamber

Action Army AAP01 GBB Part - Rotary Hop Up Chamber upgrade. A much nicer upgraded hopup chamber for use on AAP-001 airsoft pistols. Easy to adjust the hop with this awesome unit. Made to fit specifically on the airsoft AAP01 gas blowback pistol. Official Action Army product. Easy to install and upgrade with.