M4 (T.Marui) Ø6.03 Copper Inner Barrel (370mm) for GBB 14.5" barrel / 13.5" + CQB Muzzle Brake

This 6.03 precision tight-bore upgrade inner barrel is made by CNC process.

This 370mm length inner barrel is specially made for M4 (T.Marui) GBB with 14.5” outer barrel or 13.5” outer barrel with CQB Muzzle Brake.  While it provides tighter grouping and higher accuracy shooting, it offers best hop-up performance for longer shooting range.

All products are for airsoft only.  They are not made for real steel firearms.