NBS AR-15 .223/5.56 Bolt Carrier Group – Phosphate - 51108
Only 4 left in stock
The NBS 5.56 Bolt Carrier Group for AR-15 rifles is made from high quality materials with quality assurance measures like high pressure testing and magnetic particle inspecting. The bolt assembly is machined from 9310 steel and tested to ensure it can withstand thousands of high-pressure rounds. The Carrier assembly is machined from 8620 steel and the entire BCG is magnetic particle inspected to ensure every dimension is as precise at can be. The Manganese Phosphate coating on this AR-15 bolt carrier group will increase in lubricity as it absorbs oil and combines with the natural lubricity of carbon to ensure your rifle will run reliably.
Features:
- Compatible with 5.56 NATO, .223, and .300 BLK
- M16 cut and full auto rated
- 8620 steel carrier
- 9310 steel bolt
- MPI and HPT
- Manganese Phosphate coating
- Properly staked gas key
- Chrome lined gas key and firing pin channel
- Shot peened bolt face
- Black O-ring extractor insert
| Weight | 16 oz |
|---|---|
| Bolt Material | 9310 Steel |
| Cartridge Compatibility | .223/5.56 NATO/.300 BLK |
| Finish | Mag Phosphate |
| Carrier Profile | M16 |
| High Pressure Tested | Untested |
| Magnetic Particle Inspected | Magnetic Partical Inspected |
| Platform | AR-15 |
| Bolt Finish | Mag Phosphate |
| MPN | 51108 |
| UPC | 999997835 |
Compliance
NFA (National Firearms Act) compliance is crucial for legal ownership and transfer of regulated firearms and accessories like short-barreled rifles, suppressors, and certain types of ammunition, ensuring adherence to federal regulations to avoid legal penalties and ensure responsible firearm ownership.
Customer Reviews
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US
Excellent bolt carrier groups
As with anything I purchase through ar15 discounts, I'm very pleased
USExcellent bolt carrier
easy to install and flawless operation.
USGood quality
Works fine. Good build quality.
United StatesOver-priced even now
Might have gotten a lemon but BCG did not function in any rifle. The price may be right but spend a little more and get a better product. As usual AR discounts were great to deal with. Product 1/10 AR Discounts 10/10.
