Microbest C158 HPT/MPI 5.56 Bolt Carrier Group - Chrome
Out of stock
The Microbest Bolt Carrier Group is a great choice for any build. This drop-in AR-15 BCG features a corrosion resistant hard chrome finish, MIL-SPEC dimensions, and a magnetic particle inspected carpenter 158 steel bolt. Crafted from domestically sourced 8620 steel, the M16 cut carrier includes a gas key fastened by properly staked grade 8 screws. Made in the U.S.A.
Features:
- .233/5.56 NATO
- Hard chrome finish
- M16 cut
- Aircraft quality 8620 steel carrier
- 4130 steel gas key
- Properly staked grade 8 gas key screws
- Carpenter 158 steel bolt
- 4140 steel extractor
- MIL-SPEC O-ring
- MIL-SPEC gas rings
- 4140 steel cam pin
- 8740 steel firing pin with hard chrome finish
- Magnetic particle inspected
- Proudly made in the U.S.A.
| Weight | 15 oz |
|---|---|
| Bolt Material | Carpenter 158 Steel |
| Cartridge Compatibility | .223/5.56 NATO/.300 BLK |
| Finish | Chrome |
| Carrier Profile | M16 |
| High Pressure Tested | Individually HP Tested |
| Magnetic Particle Inspected | Magnetic Partical Inspected |
| Platform | AR-15 |
| Bolt Finish | Chrome |
| UPC | 14700 |
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 BCG
Gauged this one myself. Everything passed and is a quality product. Machine work is excellent, finish is smooth, and has tight gas sealing. Highly recommended.
USReview
Initially came in with machining marks on the exterior, I had to exchange it. Not very impressed with a manufacturer that's considered top tier. Everything else was good, tight tolerances.
United StatesSell as blems
BCG is completely functional as one would expect from Microbest. However they should be sold as blems. The carrier has a deep gouge that doesn’t affect function. AR-15 Discounts-just call it what it is. A blem!
United StatesShould be marked as BLEM
This item should be marked as a blem. I don’t ever care about cosmetic scratches or machine marks (these are present here too though). The biggest concern is the decent sized dent on the mouth of the gas key. I still need to check if it will property fit in with the gas tube. If not I’ll have to return it. Only recommending based off of microbest’s reputation.
USA great, cost-effective chrome BCG
Between the WWSD project and the current retro trend, chrome BCGs are having a moment! This is a good-quality BCG from a reputable manufacturer that gives you the benefits of chrome (easy cleaning) at a more affordable price point than the Young/KE Arms BCG or the now-discontinued chrome BCG from Daniel Defense. Machining/tool marks on mine are rather faint, and smooth to the touch; not bad enough to my mind to deduct a star. One of the downsides to chrome is that it tends to accentuate tool marks that would ordinarily be covered by a phosphate finish. I’m using mine in an XM16E1 clone, and so far it’s performed well with no hiccups or stoppages. The cotter pin is also chromed (a nice touch), though I replaced it in this one with one of the older solid retaining pins.
