Tomo of X-Fire/PDI-Japan has informed us that they're developing new products for the Tokyo Marui new generation M4, which means the SOPMOD and SOCOM version, plus other M4/AR-15 line up that Tokyo Marui will come out with based on their acclaimed recoil and blowback electric airsoft guns. This real outer barrel for the TM M4 SOPMOD EBB-R is CNC'd and given their quality, should be great for your TM M4. Now, they just need to come out with a precision inner barrel with it. Details in Japanese.