G5 Hulk Metal Hop Unit Plus 8" GBL Inner Barrel Special Pack
The origianl cost $83 ($59+$24), not with special promotion $67 in total!
● Material: Metal made, the inner barrel 6.03 stainless steel.
● Shooting range: above 70M (test with 0.36bb)
● Compatible with GBB inner barrel, user needs to modify a little bit by using AEG barrel.
(The original GHK inner tube is AEG specification)