Brownells 75th Anniversary - A Shooting Heritage
Menu

The LMT MRP 300 Blackout barrels are a proprietary design for the LMT MRP AR-15 Upper Receivers.
A unique design, the Lewis Machine & Tool AR-15 MRP Upper Receiver allows the end user to swap barrels quickly and conveniently for flexibility in caliber, length, and even gas system.
These 300 Blackout barrels feature a DI gas system, chrome lining, a 1-7” twist rate, and are available in 10.5” and 16” lengths.

  • 300 Blackout
  • MRP compatible
  • 1-7 twist
  • Chrome lined
  • A2 style flash hider

Give your LMT MRP Upper Receiver caliber versatility with a 300 Blackout barrel.
Note: 10.5” barrel should not be used with MRP Rifle length Upper Receiver.

All NFA rules apply!


Big Book Catalog, Issue:72, Page:027
narrow your choices »
Show Filters
2 Item(s)
Backorder, See Associate
Out of Stock

Cartridge: 300 AAC Blackout

Length: 16"

Twist: 1-7

Backorder, See Associate
Out of Stock

Cartridge: 300 AAC Blackout

Length: 10.5"

Twist: 1-7