M4 (T.Marui) Ø6.03 Copper Inner Barrel (420mm) for GBB 10.5" barrel + QD Silencer

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

This 420mm length inner barrel is specially made for M4 (T.Marui) GBB with 10.5” outer barrel with QD Silencer.  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.