Toolcraft 5.56 NATO Complete M16 Bolt Carrier Group - Nitride
- 5.56 NATO with M16 cut profile
- Full auto rated
- Salt bath Nitride finish
- True Mil-Spec dimensions
- 9310 shot peened bolt
- Aircraft quality 8620 steel carrier
- 4130 steel gas key with grade 8 staked screws
- 4140 steel extractor and cam pin
- Hard chrome ground 8740 steel firing pin
- Magnetic particle inspected
The mission at Toolcraft Inc. is to build the finest AR-15 and AR-10 bolt carrier groups on the market. They accomplish this goal with the use of high tech machinery, top of the line processes, and rigorous quality control. Their team of dedicated employees are trained to look for any imperfection along the assembly line to make sure no bad products ship out their door.
Ratings & Reviews
More than what you pay for.
by Wayne B.
I've been incredibly impressed with this BCG. Its out performed some of the bolts I've spent double the price on. I've got about a thousand rounds through it so far with no malfunctions. Sometimes you get what you pay for. Sometimes you get a lot more. Super happy with my purchase.
by Coach Barry
I have used these BCGs in my last 3 AR builds and find them to be of the highest quality. I am happy to see Primary Arms add this brand to their already outstanding line of parts. Now I know where to order bolts for all future builds.