Modify Double H-Nub (2 hardness in one package) Engine Only The butt pad inner battery

The butt pad inner battery storage size is approximately 105 x 20 x 15mm and capable of accommodating most 11

It is specifically designed for VFC M249 GBB and supplies pressurized air to the ammunition box for rapid-fire performance and ultimate accuracy

Ultra-fast feeding  - Great for high rate of fire AEGs

23 and is not compatible with any other weapon

preventing you from having the hassle of pressure switches that keep falling off

Modify Double H-Nub (2 hardness in one package) Engine Only The butt pad inner batteryFeatures: 2 available hardness made from aircraft silicone Easy to modify as needed Can be used in four directions Compatible with Marui spec products Raise buckings contact with BBs to improve accuracy and range