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The Bootleg Phos Bolt Completion Kit takes a bare Bootleg .308 carrier and turns it into a running bolt carrier group. It's a smart pickup whether you're finishing a fresh build, rebuilding an AR-10, or just want a spare bolt on the shelf so you're never sidelined waiting on parts. Every piece is cut from alloy steel chosen for its job, then finished to shrug off wear and weather.
The headliner is the bolt itself, machined from 9310 steel and given a phosphate coating for corrosion resistance and durability. 9310 is an aerospace-grade alloy that runs roughly 7 to 8 percent stronger than traditional Carpenter 158 when it's heat treated correctly, and it carries a strong reputation among builders for keeping lugs intact under repeated hard cycling. On a .308 gun where bolt thrust runs higher than a 5.56, that extra toughness earns its keep.
Beyond the bolt, the kit includes a forged 4340 cam pin known for toughness and wear resistance, a 4140 steel firing pin for consistent ignition shot after shot, and a 1038 steel wire firing pin retaining pin that holds everything together. The whole assembly uses standard mil-spec components, so there's no proprietary head-scratching when it comes time to service it down the road.
This kit is designed around Bootleg's own AR-10 carriers chambered in .308, and it's a natural match for their gas-adjustable carrier group if you like dialing in your gas system. Since large-frame .308 platforms don't share a single universal spec the way AR-15s do, it's always worth confirming your carrier and bolt face are DPMS-pattern before dropping parts together. Do that quick check and you've got a bolt assembly built to outlast a whole lot of range days.
You get a phosphate-coated 9310 steel bolt, a forged 4340 cam pin, a 4140 firing pin, and a 1038 steel wire firing pin retaining pin. Together these are the parts that turn a bare Bootleg .308 carrier into a functioning bolt carrier group. The kit uses standard mil-spec components throughout.
It's built specifically for Bootleg AR-10 carriers chambered in .308 and pairs naturally with their gas-adjustable carrier group. Large-frame .308 rifles don't follow one universal standard like AR-15s do, so DPMS-pattern parts are the closest thing to common ground. Confirm your carrier and bolt face are DPMS-pattern before installing to be sure of the fit.
A properly heat-treated 9310 bolt runs about 7 to 8 percent stronger than mil-spec Carpenter 158, and it has a reputation for resisting lug failure. Both are excellent when made right, and manufacturing quality matters as much as the alloy itself. On a higher-pressure .308 platform, that extra toughness is a nice thing to have.
Phosphate adds corrosion resistance and holds lubricant well, which helps the bolt run smoothly and hold up in rougher conditions. It's a proven, no-nonsense finish that's easy to clean and maintain. For a bolt that sees regular use or gets stored between range trips, it's a practical choice.
| UPC | 850008671012 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | BP-ABC-P30 |
| Product Type | Bolt Carrier Group |
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