Another 5KU product for you to consider in building your own custom M4 Gas Blowback Rifle. The 5KU CNC'd Skeletonised Grip for Gas Blowback is now in stock at 18Airsoft. Available in black, red, and blue colours, these are made for M4 GBBs for obvious reasons. These do not have grip panels like the 5KU CNC'd Modular Pistol Grip with the Knurl Texture. If you want a more lightweight rifle, then you might want get this.