INTRODUCTION OF T-N.T. UPGRADE KITS / GHK-G5 GBB
After precise calculation, revision and testing, piston internal with T-N.T. specially modified plug & plug spring, just simple installation, significantly enhance the of kinetic energy 10%~15%!!
Make your Airsoft gun performance enhance to the higher level !!
※Recommends using semi-auto to achieve the best performance※
※Recommendations have the D.I.Y. ability※