Airsoft Masterpiece Hop Up Base For 1911 - Full Set (Brass) outer barrel so you need specific battery

so you need specific battery sizes to fit properly

and an adjustable ratcheting harness to fit most head sizes

A great piston head from Japan for your airsoft AEG

including proximity trigger sensor which offers even 250 sensitivity settings

Airsoft Masterpiece Hop Up Base For 1911 - Full Set (Brass) outer barrel so you need specific batteryAirsoft Masterpiece parts and accessories excel in quality and durability making them very sought after for Hi Capa builds. The Airsoft Masterpiece hop up has a strong brass construction making it withstand high stress short stroke builds while providing a very good aggressive amount of hop thanks to its hop arm. The Airsoft Masterpiece hop up unit is a good upgrade to add to your Hi Capa build to make it extra durable. Features: Durable construction