CMMG 38AE50BAB: Carrying on the AR15\'s reputation for modularity, CMMG builds our larger caliber rifles like .308 WIN on Mk3 (AR-10) size platform, which is based on the LR-308/DPMS Gen 1 high-pattern design. Features EML handguards, full length M-LOK slots on both sides and the bottom of the handguard as well as M-LOK between the top picatinny rail sections; Zeroed parts including: pistol grip, drop-in trigger, 60/90 degree ambi safety, linear compensator, ambi mag catch, extended mag release button, ambi charging handle, bolt catch and polymer dust cover. Includes 20rd PMAG magazine.