Maple leaf precision barrel + aluminum hop chamber for Marui/we hi capa 5.1 gas pistol

New custom steel barrel with 6.01mm inner diameter
reinforced and lightweght hop chamber
pre-assembled items to install instead of original block
for we/marui hi capa and compatible gas pistols

included parts:
-6.01 x 113mm steel barrel
-hop chamber with tools
-hop packing