Primary Weapons Systems MK1 Mod 2-M Complete Lower Features The Primary Weapons Systems MK1 Mod 2-M lower receiver is forged from 7075-T651 aluminum a premium material chosen for its strength and long-term durability under heavy use. Its Mil-Spec Type III Class 2 hard coat anodize finish enhances resistance to wear and corrosion keeping the receiver protected through years of range and field use. Ambidextrous controls run throughout the design giving both left and right-handed shooters full and intuitive access to every function without compromise. The Mil-Spec Enhanced trigger carries a PTFE coating for smooth reliable performance and breaks between 5.5 and 6.5 pounds adjustable for personalized shooting comfort. The PWS Enhanced Buffer Tube includes a ratchet lock castle nut and a built-in QD mount for secure sling attachment while the PWS Enhanced H2 Steel Body Buffer ensures smooth cycling and reduced felt recoil. Furniture comes from Bravo Company USA whose buttstock and pistol grip are chosen for superior comfort and control during extended shooting sessions. Primary Weapons Systems built its reputation on long-stroke piston systems designed to reduce maintenance under high-volume fire and that engineering pedigree carries into this AR-15 compatible multi-caliber lower. All proprietary ambidextrous parts ship installed making the MK1 Mod 2-M ready to accept a compatible upper receiver right out of the box. Primary Weapons Systems MK1 Mod 2-M Complete Lower Specifications Manufacturer: Primary Weapons Systems Model: MK1 Mod 2-M Complete Lower Type: Complete Lower Receiver Action: Semi-automatic Caliber: 5.56 NATO Material: 7075-T651 Forged Aluminum Finish: Hard Coat Anodized Color: Black Grips: Bravo Company USA Pistol Grip Stock: Bravo Company USA Buttstock Trigger: Mil-Spec Enhanced PTFE Coated Trigger Pull Weight: 5.5 to 6.5 lbs Buffer Tube: PWS Enhanced Ratchet Lock Castle Nut QD Mount Buffer: PWS Enhanced H2 Steel Body Available At: GrabAGun