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Brownells 75th Anniversary - A Shooting Heritage
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The MK111 MOD 1-M is perfect for shooters looking for a weapon with endless uses. Maintaining the shortest barrel length recommended for suppressed use, this compact upper receiver is one of the most popular from LE to heli-hunting. The MK111 upper receiver has an 11.85” barrel and a Triad556 Compensator.

The MK116 MOD 1-M upper receiver comes from one of the most popular firearms PWS manufactures. Being a go-to for Law Enforcement communities looking for non-NFA items, this rifle can be seen in-use by over 85 LE communities in the United States. The MK116 upper receiver has a 16.1” barrel with a FCS 556 Compensator.

  • Long stroke piston system
  • M-LOK handguards
  • Includes Radian Raptor Charging Handle
  • 3-setting adjustable gas system
  • 1:8 barrel twist rate

With the fully forged upper, the MK1 MOD 1-M is a no-nonsense tool for when you need a high value option that is relentless and unstoppable.


Big Book Catalog, Issue:73, Page:006

PRIMARY WEAPONS - AR-15 MK1 MOD 1-M UPPER RECEIVER ASSEMBLY 223 WYLDE M-LOK

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Cartridge: 223 Wylde

Length: 11.85"

Twist: 1-8

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In Stock

Cartridge: 223 Wylde

Length: 16.1"

Twist: 1-8