NBS Lightweight .223/5.56 Bolt Carrier Group - Black Nitride - 520151S
In stock
The NBS Lightweight 5.56/.223 Nitride Bolt Carrier Group for the AR-15 platform is precision made to MIL-SPEC standards using the highest quality materials and machining available. By reducing the mass of the BCG, felt recoil is diminished, allowing you to stay on target for more accurate shooting. The NBS Lightweight BCG is perfect for competition/3-gun applications when paired with an adjustable gas block and a lighter buffer!
The carrier is made from 8620 tool steel and is paired with a 9310 steel bolt. The carrier and bolt are then treated with a nitride finish to ensure longevity.
Features:
- AR-15/M4 BCG
- .223/5.56 NATO
- Black nitride finish
- Magnetic particle inspected
- 9310 steel bolt
- Case hardened 8620 tool steel heat treated carrier
- Properly staked gas key
- Grade 8 fasteners
- 4140 steel cam pin
- Shot peened tool steel extractor
MADE IN THE USA
| Weight | 8.96 oz |
|---|---|
| Bolt Material | 9310 Steel |
| Cartridge Compatibility | .223/5.56 NATO/.300 BLK |
| Finish | Salt Bath Nitride |
| Carrier Profile | Lightweight |
| High Pressure Tested | HP Tested |
| Magnetic Particle Inspected | Magnetic Partical Inspected |
| Platform | AR-15 |
| Bolt Finish | Nitride / Melonite |
| MPN | 520151S |
| UPC | 6108 |
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
- Reviews
- Questions
US
Excellent light bcg
Very well made light weight bcg, works flawlessly. Slightly heavier than faxon light bcg but $150 cheaper.
USGreat Choice For Ultralight Build
I combined this lightweight bolt with a std. buffer that had two of the three weights removed to lighten it by another ounce. To make up for the loss of reciprocating mass, I added a Wolff Extra Power Buffer Spring. This combo took over a quarter pound out of the rifle, and works great for me.
USGreat quality
This has been flawless I have had issues with other lightweight carrier groups in that they leaked gas, making for a lot of cleaning, but this is really high quality.
USNice Addition for my new build
Bought this for my 7.5 AR Build, def felt the weight reduction, cycles clean with no issues. Love it!!
USDon't be afraid to adjust gun.
Works well, smooth, adjusting as necessary is fun. Lease recoil.
