Constructed and Finished for the Big-Bore .458
Get your .458 SOCOM or 450 Bushmaster AR-15 running perfectly with the Brownells M16 .458 SOCOM/450 Bushmaster Bolt Carrier Group, which features construction and finishing designed to provide the best possible performance in your rifle.
The Brownells M16 .458 SOCOM/450 Bushmaster Bolt Carrier Group features a bolt head built using 9310 steel, which undergoes heat treatment and shot peening for a durable finish. The carrier itself is made using 8620 steel that undergoes hardening after machining.
- Undergoes magnetic particle inspection
- Extractor construction includes rubber insert and spring
- Increased corrosion resistance offered through black-nitride finish
- Features torqued and staked gas key
The Brownells M16 .458 SOCOM/450 Bushmaster Bolt Carrier Group provides users with a complete assembly, also including a firing pin, cam pin and a firing pin retaining pin.
Big Book Catalog, Issue:71, Page:009
Today Sellier and Bellot produce ammunition using high quality components which is the choice of hunters, competitive shooters, law enforcement agencies and militaries around the world. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.
Full metal jacket bullets are ideal for furbearer hunting or competitive shooting because their smooth design decreases the chance of deformation upon impact and improve feed reliability. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.
You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition. All ammunition must be shipped Domestic Ground. Shipping not available for International residents. Residents in CA, DC, DE, IL, MA, NY, CT, NJ and OH may have additional restrictions. Always make sure you use the correct ammunition for your firearms. Check your state and local laws for any other applicable firearms and ammunition regulations. Due to Department of Transportation regulations, we cannot accept returns on ammo. Please check local laws before ordering. View full restrictions here.
Ammunition pricing is per box. ATTENTION – California Customers
Brownells is still shipping ammunition orders to California but the process has changed to comply with California Proposition 63. We must now ship ammunition purchased online to an FFL or California-approved ammunition dealer. After placing your order, a Brownells representative will contact you to ensure your ammunition arrives quickly and in compliance with the law.
Bullet Diameter (inches):0.355, Bullet Ballistic Coefficient: 0.08