- Corrosive Resistance
- Carbon Resistance
- Extreme Metal hardness 85-90 Rockwell
Caliber / Gauge .223/.223 Wylde/300acc blackout/5.56 NATO
Carrier Style mil-spec
Bolt Finish Parkerized
Bolt Material 9310 Steel
Carrier Finish Black Nitride
Gas Key Staked
Magnetic Particle Inspection Yes
Combat Armory machinist take pride in delivering the very best for our customers used by Military, Police, and Firearms enthusiasts
Fast shipping, great price. Thank you.
BETTER GET SOME OF THESE FOR BACKUP!
Product is great. No issues encountered. Drop it in, start shooting. Price is the best part. Find the coupon code to make it even better.
Bought a pair to go with an upper I purchased and functioned flawlessly, immediately placed another order!
They always have the best prices and selection at rock bottom pricing
This is a nice upper, especially for the price. I have 5 of these now and I am very happy with them.
The finish appears to be good on these components and the bolt group seems to be well made. Can’t beat the price when they are on sale.
Couldn't pass up the great deal here for veterans day. Shoots perfect with no jams.
was pleasantly surprised to find both items of great quality and fit.
would definitely purchase again for another build.