BCI M4 "GROOVED/SLOTTED" Super Lightweight Outer Barrel for AEG (various lengths)

The BCI M4 "GROOVED" Outer Barrel offers a noteworthy balance of lightweight construction and sturdy durability. 14mm CCW CNC aluminum threaded adapter guarantee secure installation of barrel extensions and flash hiders. Compatible with MAXX and regular hop up units, this barrel is available in an array of sizes for your AEG.