T-N.T. Studio APS-X HOP-UP System H+ Retrofit Kit for GHK M4 GBB (320mm) Length-(mm)_280 Excellent Craftsmanship with Textured grip

Excellent Craftsmanship with Textured grip and Solid Pistol Frame

Sling hook is located on both left & right

This product is designed for Airsoft and is already blocked the gas pipe tunnel

CNC Stainless Steel Construction (Light Weight)

T-N.T. Studio APS-X HOP-UP System H+ Retrofit Kit for GHK M4 GBB (320mm) Length-(mm)_280 Excellent Craftsmanship with Textured gripT N. T. Studio APS X HOP UP System H+ Retrofit Kit for GHK M4 GBB (320mm) Aluminum Construction Design For Upgrade the Origianl Parts The kit ensures better accuracy due to better and finer tuning of the hop up. Suitable For GHK M4 Series Airsoft Gas Blow Back GBB Rifle