Primary Weapons Systems MK1 MOD 1-M Pro Complete AR-15 Lower Receiver

Manufactured by Primary Weapon Systems
SKU: 18-M100RM1B
MPN: 18-M100RM1B
Manufactured by Primary Weapon Systems
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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



The Primary Weapons Systems MK1 MOD 1-M Pro Complete Lower Receiver is their standard Mil-Spec model yet still comes with some of the enhanced features that the MOD 2-M has. This forged AR-15 lower receiver comes with the PWS enhanced fluted buffer tube with ratchet lock castle nut and QD end plate. Attached to the buffer tube is a Bravo Company USA stock. It also comes with the PWS enhanced H2 buffer weight optimal for use on rifles with shorter barrels. The ergonomic Bravo Company USA pistol grip and Nickel PTFE coated trigger round at this amazing value AR-15 lower receiver.


  • Forged 7075-T6 aluminum
  • Hardcoat anodized
  • Mil-Spec lower parts
  • Fluted buffer tube
  • Ratchet lock castle nut and QD end plate
  • H2 buffer weight
  • Mil-pec Nickel PTFE coated trigger
  • BCM stock and pistol grip
  • Weight: 2 lbs. 4 oz.

The mission at Primary Weapons Systems is to provide the highest quality tactical and sporting rifles and accessories for sportsmen, military, and law enforcement at a fair, competitive price.

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BrandPrimary Weapon Systems
Caliber MarkingMulti-Caliber
FinishHardcoat Anodized
Receiver Material7075-T6 Aluminum
Trigger Pin DiameterMIL-SPEC .154
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

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