The faxon grendel arc arc Type 2 Bolt in Black Nitride is purpose-built for high-pressure, long-range calibers that demand extra strength, consistency, and dependability. Whether you are assembling a precision rifle or modernizing an existing upper, this Type II bolt delivers durability and compatibility with SAAMI-spec 6.5 Grendel, 6mm ARC, 22 ARC, and .338 ARC chamberings. For serious long-range AR-15 shooters, this is the bolt to build around.
What the faxon grendel arc arc bolt is and who it is for
Made by Faxon, this Type II bolt is aimed at precision and long-range shooters running the Grendel-family case head. These cartridges push higher pressures and longer effective ranges than standard 5.56, so the bolt has to be stronger and more consistent to match.
The faxon grendel arc arc Type 2 bolt is designed with a .136-inch co-bore bolt face to align with Type II barrels and bolt carriers, so compatibility with a proper Type II build is exact rather than approximate.
Key features of the Type 2 bolt
- Machined from 9310 tool steel and fully heat-treated to mil-spec standards.
- Shot-peened to increase fatigue resistance under repeated high-pressure cycling.
- Salt bath nitrided for a smooth, corrosion-resistant surface that cleans easily.
- Magnetic Particle Inspected to confirm each bolt is free from defects.
- .136-inch co-bore bolt face and 45-degree chamfered lugs for correct Type II fit and engagement.
Specs and construction
The bolt is machined from 9310 tool steel, fully heat-treated to mil-spec standards, and shot-peened to increase fatigue resistance. It is then salt bath nitrided to provide a smooth, corrosion-resistant surface that enhances lubricity and cleans up easily after high round counts, which matters on a hard-working precision rifle.
Each bolt is Magnetic Particle Inspected to ensure it is free from defects and built to last. The design uses a .136-inch co-bore bolt face to align with Type II barrels and carriers, and the lugs are chamfered at 45 degrees for improved engagement and smoother lockup.
Practical use, care, and compatibility
Because this is a Type II bolt with a .136-inch co-bore face, confirm your barrel and carrier are the matching Type II pattern before installing, then check headspace per standard practice. Once fitted, it supports SAAMI-spec 6.5 Grendel, 6mm ARC, 22 ARC, and .338 ARC, covering the whole Grendel-family lineup with one bolt.
Maintenance is routine: clean the bolt, keep the lug recesses and gas rings clear of carbon, and lubricate before use, with the nitride finish making that quick. Inspect the lugs and extractor at regular service intervals given the pressures involved. To pair it with a matching carrier or gas block, browse our full parts and upgrades catalog. For a durable long-range build, the faxon grendel arc arc Type 2 bolt is a precision-grade foundation.
Type II compatibility is the detail that matters most here, because the co-bore bolt face must match a Type II barrel and carrier to headspace and function correctly. Get that pairing right and you have a foundation ready for the accuracy these long-range cartridges are capable of.
The Grendel-family case head sees higher pressures than 5.56, so the 9310 tool steel, mil-spec heat treatment, and MPI testing are not marketing points but genuine requirements. Inspect the lugs and extractor at regular intervals given those pressures, and keep the bolt clean and lubricated. For a precision build in 6.5 Grendel, 6mm ARC, 22 ARC, or .338 ARC, starting with a proven Type II bolt is the right call.
For the precision shooter chasing the reach of the Grendel-family cartridges, the bolt is the single most important link in the chain. Starting with a properly made and tested Type II bolt sets the whole rifle up to deliver on its long-range promise.
Built for high pressure and long range, this Type 2 bolt anchors a serious Grendel-family upper. Ships direct to your door, no FFL required.
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