Brownells 75th Anniversary - A Shooting Heritage
Menu

The Midwest Industries Bolt Carrier Groups are just what you need for an upgrade or your next build! Available with four different finishes, the Midwest Bolt Carrier Groups boast an 8620 M16 Style Carrier, Carpenter 158 .223/5.56 Bolt, 4140 Billet Gas Key & Cam Pin, Billet Machined Extractor, and a 17-4 H-900 Stainless Steel Firing Pin! High quality parts from a High-quality manufacturer!

The Midwest Industries Bolt Carrier Groups come in Black Nitride, Nickel Boron, DLC Flat Dark Earth and Titanium Nitride! The Carpenter 158 Bolt is heat treated, shot peened, precision ground for perfect dimensions, and MPI Tested. The 4140 Billet Gas Key is properly torqued with Grade 8 fasteners, and properly staked to ensure reliability. The 4140 Billet Cam Pin is nitride treated for wear resistance. The Billet Machined Extractor is machined from solid 4140 bar stock, heat treated and shot peened, coated for reliable extraction, extractor insert, and O-Ring are included.

Proudly made in the USA!

narrow your choices »
Show Filters
4 Item(s)

Filtered Matches

Alert Me When Available

This item is currently unavailable for backorder.

Cartridge: 5.56 mm NATO

Finish: Flat Dark Earth

Other Matches

Alert Me When Available

This item is currently unavailable for backorder.

Cartridge: 5.56 mm NATO

Finish: Nickel-Boron

Alert Me When Available

This item is currently unavailable for backorder.

Cartridge: 5.56 mm NATO

Finish: Black Nitride

Alert Me When Available

This item is currently unavailable for backorder.

Cartridge: 5.56 mm NATO

Finish: Titanium Nitride