Banana Airsoft reviews the GHK M4 RIS Gas Blowback Rifle. Make sure the language caption is openin the player as this is done in Spanish... "GHK is a company which is primarily known for its high quality interpretation of the M4 gas blowback rifle. True to the original, this replica has internal system and stainless steel barrel, 4 aluminum rails and buttgrip and high resistance polymer.

The system gives an exceptional blowback resulting into an incredible recoil with each shot and shoots flawlessly. For best results we recommend using GBBs of the same brand.