The PWS MK2 Mod 2 is a complete, multi-caliber AR-platform lower receiver built with Magpul furniture (Primary Weapons Systems part no. M2M2LWRCR). Primary Weapons Systems was founded by firearm enthusiasts who began by developing muzzle devices before creating their own long-stroke piston upper systems, and PWS carries that same attention to reliability into its lower receivers. This MK2 Mod 2 lower ships complete and assembled, giving builders a proven, mil-spec-compatible foundation to pair with an AR upper for a home-defense carbine, range rifle, or duty build.

Key Specifications

• The lower ships as a Complete Lower Receiver, ready to mate with a compatible upper.
• It’s built to accept Multi-caliber AR upper receivers for chambering flexibility.
• A Semi-Auto action provides reliable, one-round-per-trigger-pull operation.
• It comes equipped with Magpul furniture for a durable, ergonomic feel.
• The receiver is engineered from 7075-T651 forged aluminum for durability under recoil.
• It carries a Mil 8625 Type III Class 2 hard coat anodized finish for corrosion resistance.
• A flared magazine well speeds up reloads.
• An integrated trigger guard is machined directly into the lower.
• Fully ambidextrous controls accommodate right- and left-handed shooters.

Frequently Asked Questions

Does this lower come assembled? Yes, it ships as a complete, ready-to-run lower receiver.

Will it work with multiple AR calibers? Yes, it’s built to accept multi-caliber AR upper receivers.

Buy the PWS MK2 Mod 2 Complete Rifle Lower Receiver

Build on a proven foundation from Primary Weapons Systems. Shop more rifle lowers and order this MK2 Mod 2 from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.