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Lantac
The Lantac M-SPEC 7.62 BCG Nitride Black Bolt Carrier Group delivers milspec reliability and durability without the premium price tag. Built for AR-10s and other .308-platform rifles, this bolt carrier group combines proven military dimensions and tolerances with thoughtful material upgrades that lift performance above basic spec while keeping costs in the realm of budget builds and no-compromise function. If you're assembling or upgrading a 7.62 rifle and want a carrier that handles duty-grade demands without breaking the bank, this is the piece that does the job.
The carrier is machined from 8620 steel, case-hardened and precision finished to milspec dimensions, then QPQ nitrided for superior corrosion resistance compared to standard phosphate coatings. The bolt itself is forged from Carpenter 158 or 9310 steel, shot-peened and hard-turned to spec, ensuring reliable feeding and extraction through thousands of rounds. That full-auto style mass keeps recoil impulse manageable and helps feed reliability in suppressed or unsuppressed setups alike.
The included Lantac CP-R360 domed cam pin is where attention to detail shows: machined from 17-4PH stainless steel, hand-polished, and hardened to H900 condition, it reduces friction and wear in your upper receiver during cycling. It's a small part that compounds reliability over the life of your gun. The bolt is MPI-tested for consistency, and shot-peening is documented to mil specs (S110 shot, .006–.008 Almen deflection)—the kind of quality control that tells you this carrier group won't let you down at the range or in the field.
Made in the USA and backed by a lifetime warranty, the M-SPEC 7.62 BCG is the thinking person's choice for a rifle build that refuses to compromise on function or durability.
| Caliber | 7.62 / .308 NATO |
| Carrier Material | 8620 Steel, case-hardened |
| Bolt Material | Carpenter 158 or 9310 Steel |
| Finish | QPQ Nitride |
| Bolt Treatment | Shot-peened, hard-turned and ground |
| Included Cam Pin | Lantac CP-R360 domed, 17-4PH stainless steel |
| Shot Peening Spec | S110 shot, .006–.008 Almen deflection |
| Warranty | Lifetime |
| Origin | USA |
This bolt carrier group is designed for .308 NATO / 7.62 rifles, including AR-10s and other .308-platform guns. It is not compatible with 5.56/.223 AR-15s—Lantac offers a separate M-SPEC BCG in 5.56 caliber for that platform.
QPQ nitride provides measurably better corrosion resistance and surface hardness than traditional Type M phosphate. It also tends to maintain a cleaner appearance over time and offers improved durability in high-round-count or harsh-environment use.
The Lantac CP-R360 domed cam pin is included with the BCG. It is precision machined from 17-4PH stainless steel, hand-polished, and hardened to H900 condition to work seamlessly with the carrier and reduce friction in your upper receiver.
Yes. The bolt is MPI (magnetic particle inspection) tested to verify structural integrity and consistency before shipment.
Lantac
The Lantac M-SPEC 7.62 BCG Nitride Black Bolt Carrier Group delivers milspec reliability and durability without the premium price tag. Built for AR-10s and other .308-platform rifles, this bolt carrier group combines proven military dimensions and tolerances with thoughtful material upgrades that lift performance above basic spec while keeping costs in the realm of budget builds and no-compromise function. If you're assembling or upgrading a 7.62 rifle and want a carrier that handles duty-grade demands without breaking the bank, this is the piece that does the job.
The carrier is machined from 8620 steel, case-hardened and precision finished to milspec dimensions, then QPQ nitrided for superior corrosion resistance compared to standard phosphate coatings. The bolt itself is forged from Carpenter 158 or 9310 steel, shot-peened and hard-turned to spec, ensuring reliable feeding and extraction through thousands of rounds. That full-auto style mass keeps recoil impulse manageable and helps feed reliability in suppressed or unsuppressed setups alike.
The included Lantac CP-R360 domed cam pin is where attention to detail shows: machined from 17-4PH stainless steel, hand-polished, and hardened to H900 condition, it reduces friction and wear in your upper receiver during cycling. It's a small part that compounds reliability over the life of your gun. The bolt is MPI-tested for consistency, and shot-peening is documented to mil specs (S110 shot, .006–.008 Almen deflection)—the kind of quality control that tells you this carrier group won't let you down at the range or in the field.
Made in the USA and backed by a lifetime warranty, the M-SPEC 7.62 BCG is the thinking person's choice for a rifle build that refuses to compromise on function or durability.
| Caliber | 7.62 / .308 NATO |
| Carrier Material | 8620 Steel, case-hardened |
| Bolt Material | Carpenter 158 or 9310 Steel |
| Finish | QPQ Nitride |
| Bolt Treatment | Shot-peened, hard-turned and ground |
| Included Cam Pin | Lantac CP-R360 domed, 17-4PH stainless steel |
| Shot Peening Spec | S110 shot, .006–.008 Almen deflection |
| Warranty | Lifetime |
| Origin | USA |
This bolt carrier group is designed for .308 NATO / 7.62 rifles, including AR-10s and other .308-platform guns. It is not compatible with 5.56/.223 AR-15s—Lantac offers a separate M-SPEC BCG in 5.56 caliber for that platform.
QPQ nitride provides measurably better corrosion resistance and surface hardness than traditional Type M phosphate. It also tends to maintain a cleaner appearance over time and offers improved durability in high-round-count or harsh-environment use.
The Lantac CP-R360 domed cam pin is included with the BCG. It is precision machined from 17-4PH stainless steel, hand-polished, and hardened to H900 condition to work seamlessly with the carrier and reduce friction in your upper receiver.
Yes. The bolt is MPI (magnetic particle inspection) tested to verify structural integrity and consistency before shipment.
