New Frontier Armory New Frontier Bolt Carrier Ar40 40s&w/10mm Auto Black

New Frontier Armory New Frontier Bolt Carrier Ar40 40s&w/10mm Auto Black. Whether you have a large collection of 40 S&W or 10mm carbines the most common ammo that is fed from these rifles is 40 Smith & Wesson cartridges . Nearly everyone (myself included) who works with carbines knows that ammo can be hard on bolt carriers. When that happens to be your bolt carrier you want one that is made for a 40 S&W or 10mm magazine feeding firearm. This NFBC-AR40 carrier has a single "X" cut in the bolt face which ensures tool-less bolt removal. This carrier has a "T" cut on the opposite side of the bolt face which ensures tool-less bolt changing in the future. We are proud to say that this carrier has been extensively endurance tested. This is one of the best made bolt carriers you can buy. Specifications for New Frontier Armory New Frontier Bolt Carrier Ar40 40s&w/10mm Auto Black: Manufacturer: New Frontier Armory Color: Black Matte Fabric/Material: Steel Dimensions: 1.20 X 3.85 X 7.60 in Height: 1.2 in Package Contents: New Frontier Armory New Frontier Bolt Carrier Ar40 40s&w/10mm Auto Black