40cm ALLOY COMP barrel ✓ GEL GUN BLASTER M4A1 GEN8 : BeastPro UPGRADE

Beautiful Alloy Barrel will also fit a shit load of others.

YOU ARE BUYING:
# Beast alloy comp barrel 40cm/400mm.... 7.5mm inner. 9.5mm outer.
# Can attach a Hopup perfectly.

Random colour Black Red Blue
M4A1 Gen 8, MKM2, SCAR, M4 + LOTS MORE.