Primary Weapons Systems MK1 Mod 2-M Complete AR-15 Lower Receiver - BCM Furniture

Manufactured by Primary Weapon Systems
SKU: 22-2M100RM1B
MPN: 22-2M100RM1B
Manufactured by Primary Weapon Systems
5 Reviews

Out of Stock

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Items that are regulated by the ATF have restrictions and requirements: 
•Your entire order will ship only to a Federal-Firearm License holder.
•Please contact your local FFL prior to placing your order to ensure they are still accepting transfers.
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to



Building a top-of-the-line rifle just got easier with the Primary Weapons Systems MK1 Mod 2-M Complete AR-15 Lower Receiver with BCM Furniture. This fully ambidextrous MK1 Mod 2-M complete lower is the quality base you've been looking for for your next build.

While most receivers are custom milled from billet aluminum for weight savings, PWS cuts no corners by building the MK1 MOD 2-M from custom forgings that reduce weight, enhance strength, and offer ambidextrous controls. Finished with Bravo Company furniture and a Mil-Spec, enhanced PTFE-coated trigger, the MK1 MOD 2-M receiver is the perfect base for your next build.


  • Multi-caliber lower
  • MK1 Mod 2-M
  • Ambidextrous bolt catch/release
  • Ambidextrous magazine release
  • Forged 7075-T6
  • Anodized Finish
  • Enhanced Mil-Spec PTFE Coated Trigger
  • 5.5 lb - 6.5 lb Trigger pull weight
  • Bravo Company stock and pistol grip
  • PWS Enhanced Buffer tube
  • Ratchet lock castle nut with built-in QD MOUNT
  • PWS Enhanced H2 steel buffer
  • Ambidextrous safety selector

Primary Weapons Systems makes it their mission to provide the highest quality tactical and sporting products at an affordable price for shooters, competitors, military and law enforcement.

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BrandPrimary Weapons Systems
Caliber MarkingMulti-Caliber
FinishHardcoat Anodized
Receiver Material7075-T6 Aluminum
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

5 reviews

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by -

I've always loved an ambi lower. This is that and then some. Furniture isn't innovative, but its tried and true. Ambi bolt catch and release. Ambi safety, Ambi mag release. Someone tight snug fight with most of my uppers. Crisp trigger with about a 1 mm reset. I have no complaints. Need to pick up another one if it's ever in stock again.

Precise Accuracy when manufacturing this Lower


This thing is absolutely beautiful. And when on sale (around 470) it's truly a steal. Everything is nice and tight fitting, trigger is nice for just a milspec enhanced. Highly recommend. I paired mine with a BCM upper, Rosco Purebred 13.7 barrel, expo quad rail. Beautiful piece.

PWS Lower

by -

This is a great lower. The quality is top notch. You can't beat a great ambi lower. The controls operate great on both sides. Definitely recommend this lower.


by -

Awesome. Just awesome. That is all.

Excellent option for any AR build

by -

I love how solid this lower is. Locks up nice and tight with the upper I mated it with. The ambi controls are great. I love the ratcheting castle nut too. Will definitely get another. Only swapped the trigger and grip for my preferred set up. All in all, an excellent option for any AR build.