Airtech Studios Buttstock Extension - G&G ARP9 (GOS-V5 Stock) Pistol Platform_Other These are the "long" models

These are the "long" models

The cuffs have a large strip of good quality hock & loop velcro for easy adjustment

it has an incredibly hard kick thanks to the heavy metal slide and stiffened recoil spring

Adjustable from 1 to 4 times which is perfect for playing both indoors and outdoors

41mW output on Low and 24

Airtech Studios Buttstock Extension - G&G ARP9 (GOS-V5 Stock) Pistol Platform_Other These are the "long" modelsAirtech Studios BSEU (Butt Stock Extension Unit) for G&G ARP9 is an extender designed to fit the G&G GOS V5 stock. This will fit all GOS V5 stocks. The extension is constructed from thick Polymer attaches directly onto the existing stock as a simple upgrade. This allows you to secure your stock against your shoulder a lot easier.