The faxon bolt complete nitride is a high-quality replacement bolt designed for AR-15 platforms chambered in 5.56 NATO, .223 Remington, and .300 Blackout. Crafted from 9310 tool steel and finished in black nitride, this drop-in bolt is built to restore or upgrade the heart of your carrier group with premium materials and full mil-spec testing. When you need a bolt you can trust, this is a smart, affordable choice.
What the faxon bolt complete nitride is and who it is for
Made by Faxon, this complete bolt is for shooters rebuilding a high-round-count carrier, upgrading a budget bolt, or keeping a spare on hand for a hard-use rifle. It arrives fully assembled with the extractor and ejector in place, so it is ready to drop into a standard AR-15 carrier.
Built from 9310 tool steel and given full MIL-SPEC heat treatment, shot peening, and magnetic particle inspection, the faxon bolt complete nitride is proven before it ever ships. That testing matters, because the bolt is the single most stressed part in the action.
Key features of the complete bolt
- 9310 tool steel construction that provides enhanced strength and longevity over standard materials.
- Salt bath nitride finish that increases surface hardness, reduces friction, and resists corrosion.
- Chamfered bolt lugs with a 45-degree cut on the rear for reliable action, even with high-pressure hand loads.
- S7 tool steel extractor, fully heat-treated and shot-peened per mil-spec for consistent extraction.
- Enhanced extractor assembly with spring, insert, and a Crane O-ring for improved reliability.
Specs and construction
The bolt body is machined from 9310 tool steel, a material chosen for its superior toughness compared to standard bolt steels, then fully heat-treated to mil-spec, shot-peened to raise fatigue resistance, and magnetic particle inspected to confirm it is free of defects. That process is what separates a bolt you can bet on from one you cannot.
The salt bath nitride finish increases surface hardness, minimizes friction, and provides excellent corrosion resistance. The 45-degree chamfer on the rear of the lugs supports reliable lockup and cycling even when you feed it high-pressure loads.
Practical use, care, and compatibility
Because it is built for 5.56 NATO, .223 Remington, and .300 Blackout carriers, this bolt covers three of the most popular AR-15 chamberings in one part. Installation is simple: swap it into your existing carrier, confirm headspace with your barrel following standard practice, and you are ready to run. Keep the enhanced extractor assembly and its Crane O-ring in place for the reliability they add.
Maintenance is routine: clean the bolt, keep the gas rings and lug recesses clear of carbon, and lube it before use. The nitride finish makes wipe-downs fast. To pair it with a fresh carrier, charging handle, or gas block, browse our wider parts and upgrades selection. As a rebuild or upgrade part, the faxon bolt complete nitride is a dependable, no-drama choice.
A complete bolt like this is one of the smartest spares to keep on hand, since the bolt is the part most likely to eventually show wear or break under heavy use. Having a tested, ready-to-run replacement means a cracked lug or a tired extractor never ends a range trip or a hunt.
Because it covers 5.56, .223, and .300 Blackout, a single spare backs up several common rifles at once. Confirm headspace with each barrel per standard practice before relying on it, then keep it clean and lubricated in service. The nitride finish and mil-spec testing make it a dependable, low-cost insurance policy for any AR-15 you own.
At its price point, keeping one or two of these bolts on hand is an easy decision for anyone who shoots seriously. A tested spare bolt is one of the cheapest ways to guarantee your range day or hunt never ends because of a single worn part.
Tested, treated, and ready to run in three calibers, this complete nitride bolt restores confidence to your action. Ships direct to your door, no FFL required.
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