AR-15 MOD4SA LOWER RECEIVER

Mil-Spec Receiver With Precision Trigger Group

Rugged, semi-auto receiver made from a high-quality forging is built to handle the hard use and abuse of tactical and competitive shooting. Forged from 7075 T6 aluminum alloy, for an extra margin of strength and rigidity over standard 6061 alloy receivers, before precision machining to final mil-spec dimensions. Hardcoat anodized for added strength, then Teflon® coated for outstanding resistance to scuffs, scratches, surface abrasion, and discoloration from gun oils. Available as a Stripped lower receiver ready for a full custom build, or Complete and fully assembled including pistol grip and trigger group, with a choice of ambi safety selector or standard, left-side mounted selector. CMMG’s engineers designed custom fixtures for final grinding of 10 separate contact surfaces on the trigger, disconnector, and hammer to ensure a crisp, precise release. Proprietary bronze bushings on trigger and hammer pins reduce friction for a consistent, ultra-smooth pull and exceptionally fast locktime. Rounded, low-mass hammer further speeds locktime and reduces wear on contact surfaces. Trigger is function tested before lower leaves factory; compatible with .22 LR conversions. Receiver also includes bolt release lever, mag release button, aluminum triggerguard, and A2 pistol grip already installed. A2-style pistol grip of nearly indestructible polymer has molded-in checkering for a secure grip and is impervious to humidity, temperature extremes, and most cleaning chemicals and lubricants.