Madbull M4 CQB 7-Inch Outer Barrel map controlled Externally it features a polymer

Externally it features a polymer shell

Medium: 32" ~ 34" +- 2"

deluxe model comes with VIRGO ETU

and 9 o'clock positions allow for mounting of your favorite M-LOK accessories

40 round capacity with extended follower to ensure ever round is fed into gun

Madbull M4 CQB 7-Inch Outer Barrel map controlled Externally it features a polymer~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 groovesGreat if you want to really shorten your M4 for CQB! Note: the entire barrel including chamber section is 7" long.