The Primary Weapons MK1 MOD 2-M lower receiver is a precision-built, ambidextrous lower for shooters who demand versatility without compromise. Built from 7075-T6 aluminum and finished with Mil-Spec Type III Class 2 hard coat anodize, this lower is engineered to handle the demands of serious rifle builders and shooters who run both left and right-handed setups. Whether you're building a precision rifle, a duty gun, or a versatile do-all platform, the MK1 MOD 2-M gives you a rock-solid foundation with controls that work for any shooter.
The ambidextrous design isn't an afterthought here—PWS baked in true left and right-handed functionality from the ground up. The included Mil-Spec Enhanced trigger breaks cleanly and adjusts between 5.5 and 6.5 pounds, so you can dial in the pull weight that works for your application. The PWS Enhanced Buffer Tube ships ready to mount with a ratchet lock castle nut and integrated QD point, so you're not hunting for parts or wrestling with loose connections. The included H2 Enhanced Steel Body Buffer cycles smoothly and manages recoil without unnecessary buzz, and Bravo Company USA furniture rounds out the package with a comfortable grip and buttstock.
The 7075-T6 aluminum construction paired with hard anodize means this lower will survive years of shooting, handling, and the occasional ding without corroding or wearing through. If you're running a rifle that needs to work left or right, or if you simply want a versatile, well-finished lower receiver you can rely on, the MK1 MOD 2-M is built for real-world use.
| Material | 7075-T6 Forged Aluminum |
| Finish | Mil-Spec Type III Class 2 Hard Coat Anodize, Black |
| Trigger Type | Mil-Spec Enhanced with PTFE Coating |
| Trigger Pull Weight | Adjustable 5.5–6.5 lbs |
| Buffer Tube | PWS Enhanced with Ratchet Lock Castle Nut |
| Buffer | PWS Enhanced H2 Steel Body |
| Buttstock | Bravo Company USA |
| Pistol Grip | Bravo Company USA |
| Ambidextrous Controls | Yes |
| QD Mount | Integrated on Buffer Tube |
Yes. The MK1 MOD 2-M is designed with ambidextrous controls, making it equally functional for left and right-handed shooters without additional adapters or conversion kits.
The lower ships complete with a Mil-Spec Enhanced trigger, PWS Enhanced Buffer Tube with ratchet lock castle nut and integrated QD mount, PWS Enhanced H2 Steel Body Buffer, Bravo Company USA buttstock, and Bravo Company USA pistol grip.
Yes. The included Mil-Spec Enhanced trigger is adjustable between 5.5 and 6.5 pounds, allowing you to tune the pull weight to your preference.
The MK1 MOD 2-M is forged from 7075-T6 aluminum and finished with Mil-Spec Type III Class 2 hard coat anodize in black, providing excellent durability and corrosion resistance.
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