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When it comes to a large-frame AR build, the bolt is the part taking the real beating, and Faxon didn't cut corners here. This complete bolt is machined from 9310 tool steel, which runs stronger than the C158 you'll find in a lot of standard bolts. Every one gets fully heat treated, shot peened, and Magnetic Particle Inspected so you know the material is sound before it ever leaves the shop. On top of that, it wears a salt bath nitride finish that boosts surface hardness, cuts down on friction, and shrugs off corrosion far better than the old chrome or phosphate coatings.
This one is set up for DPMS Gen 1 pattern AR-10 platforms with a .125 bolt face, covering .308 Winchester, 6.5 Creedmoor, and 8.6 Blackout. That makes it a solid choice whether you're building fresh or swapping out a tired bolt in an existing carrier. As with any bolt going into a barrel that wasn't headspaced together, it's worth checking headspace before you send it, and Faxon points folks toward Pacific Tool & Gauge for that.
The lugs are chamfered at 45 degrees, which helps the action feed and cycle cleanly even when you're running hot handloads or a fast, lightweight setup. The extractor is cut from S7 tool steel, fully heat treated and shot peened, then sprung with a spring, O-ring, and silicone insert to keep extraction consistent round after round. It's the kind of attention to the small stuff that separates a bolt you forget about from one you're always babysitting.
Faxon has been machining AR parts for a long time and backs this bolt with their lifetime guarantee to the original owner against defects in materials and workmanship. For a build you plan to actually shoot hard, this is an easy upgrade to feel good about.
It's built for DPMS Gen 1 pattern AR-10 / LR-308 platforms with a .125 bolt face. That covers .308 Winchester, 6.5 Creedmoor, and 8.6 Blackout builds. Always confirm compatibility with your specific barrel and carrier before installing.
Yes, this listing is the complete bolt and includes a firing pin. The extractor comes installed and sprung with its O-ring and silicone insert. You'll still need your own bolt carrier and cam pin if you don't already have them.
If you're dropping this bolt into a barrel that wasn't headspaced together as a set, checking headspace before firing is the smart move. Faxon recommends Pacific Tool & Gauge headspace kits for taking those measurements. It's a quick step that saves you trouble down the road.
The 9310 tool steel is stronger than the common C158 used in many bolts, and it's fully heat treated, shot peened, and MPI tested for reliability. The salt bath nitride finish adds surface hardness, reduces friction for smoother cycling, and resists corrosion better than chrome or phosphate. Together it's a durable, low-maintenance upgrade for a large-frame build.
| UPC | 816341020900 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | FF308BCNITRIDE |
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