STNGR 5.56/.300 BLK Phosphate – Chrome Lined M16 Bolt Carrier Group – C158 Bolt

SKU: STNGR-BCG-PHOS-C158

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C158 Bolt and Phosphate Coating: Battle-Tested Durability and Superior Performance

Featuring a phosphate exterior for rugged wear resistance and a chrome-lined interior for smooth, consistent cycling, this BCG design is battle proven. Made to military specifications, this bolt carrier is made exactly like those currently used in U.S. military M4 rifles. The phosphate coating and M16 BCG are exactly what you need in a duty rifle.

Carpenter 158 (C158) Bolt

Shot-peened and magnetic particle inspected (MPI) for superior strength, ensuring flawless function and long-term reliability under heavy use.

Rugged, Battle-Tested Durability

The phosphate finish offers exceptional wear resistance, while the chrome-lined interior ensures smooth, reliable cycling.

M16 Full-Auto Rated Carrier

Built with an M16-profile carrier for increased mass, delivering enhanced durability and smoother operation in semi-automatic rifles and gives a peace of mind in functionality.

STNGR sources these BCGs from one of the largest suppliers of bolts and carriers in the firearms industry.  When you buy a BCG from us, you’re getting a high-quality product that’s made in the USA, that’s trusted by dozens of brands and manufacturers, and we back every one with our STNGR lifetime warranty.

Specifications

  • Caliber: .223/5.56, .300 Blackout, .350 Legend
  • Finish type: Phosphate
  • Carrier Type: M16/Full Auto Capable (Best for AR-15)
  • Carrier Material: 8620 Gun Steel
  • Gas Key Material: 4130 Steel
  • Gas Key Screws: Grade 8
  • Bolt Material: Carpenter 158
  • Extractor Material: 4140 Steel
  • Cam Pin Material: 8620 Steel
  • Firing Pin Material: 4140 Steel, Chrome Plated
  • Mil-Spec O-Ring and Gas Rings
  • Weight: 11.5 oz.
  • Country of Origin: USA

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

SWARM Warranty

STNGR USA products are warranted to the *original purchaser against any defects in materials and workmanship for the lifetime of the product. STNGR USA has sole discretion to determine manufacturer’s defects. The Swarm Warranty policy does not cover loss or theft. Cosmetic damage or changes that leave the product still in a functional condition, damage from improper use or intentional damages are also not covered by the warranty and will not be accepted. Items that have been modified or in any way altered from the original condition are not covered by the Swarm Warranty.

Eyewear lenses are fully covered by a 1 year scratch warranty. If you scratch or damage your lenses within 1 year of purchasing, STNGR will send you up to 1 pair of replacement lenses. This warranty only applies to the original purchase and not subsequent replacements. You also qualify for **20% off replacement lenses for life. Email  to receive your discount code.

Eyewear Lost & Broken Replacement Discount

Sometimes life happens. If you ever break or lose your sunglasses, no matter the reason, you’re covered with a hefty discount. Shoot STNGR an email at and you’ll get you hooked up with an exclusive 30% discount on future replacements.


*The original purchaser may have purchased from any of the following sources: Directly from STNGR (stngrusa.com or stngredge.com) or from an authorized dealer, distributor, or retailer. The original purchaser may be asked to show proof of purchase.

**The 20% discount is subject to replacement lens availability.

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