Tazz and Tim of RWTV go to the RedWolf Labs to check out the Angry Gun M4 Recoil kit made for the WE M4 Gas Blowback Rifle. Using almost, but simpler, the same method as another upgrade parts company from Taiwan, they'll show you if the recoil kit is better than the default system, and of course, how to upgrade your WE M4 GBB with it.