Mad Bull M4-CQB 7inch barrel

~1cm length adjustable. Fits most M4 AEG receivers in the market.
"2" screws to lock the adjustable parts.
This barrel is for extreme short CQB setups, features front sight pin grooves
Great if you want to really shorten your M4 for CQB!
Note: the entire barrel including chamber section is 7" long.