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Lantac
The LanTac M-SPEC BCG is a 223/556 bolt carrier group engineered to deliver solid mil-spec performance without the premium price tag. Built in the USA, this TiN-coated carrier strikes the balance that budget-conscious builders and shooters need: rock-solid reliability with thoughtful upgrades that lift it above basic military specification. If you're running an AR platform for range work, training, or hunting and want a dependable BCG that won't nickel-and-dime you, the M-SPEC line is exactly the kind of no-nonsense choice that keeps your rifle running when it matters.
The carrier itself is machined from 8620 steel, case hardened and precisely ground to mil-spec tolerances for flawless upper receiver fit. Instead of the standard Type M phosphate finish, LanTac applies QPQ nitriding for superior corrosion resistance and wear characteristics—a meaningful upgrade at a reasonable cost. The bolt is sourced from Carpenter 158 or 9310 steel, shot peened and hard turned per military spec, ensuring consistent ignition and longevity. Every M-SPEC BCG also ships with LanTac's proprietary CP-R360 domed cam pin, hand-polished from 17-4PH stainless steel and hardened to H900 condition; this precision-fitted component reduces friction and wear in your upper, extending service life and smoothing bolt cycling.
The TiN (titanium nitride) diamond-like carbon coating protects against corrosion and fouling, making field cleaning easier and bolt life longer. Shot peening is conducted to demanding standards (S110 shot, Almen Gage A-2 strip .006–.008), ensuring uniform strength and durability. Whether you're building a first rifle, running a range day special, or refreshing a workhorse, the M-SPEC BCG delivers American-made quality with the warranty backing to prove it.
| Caliber | 223/5.56 NATO |
| Carrier Material | 8620 Steel, case hardened, hard turned/ground |
| Bolt Material | Carpenter 158 or 9310 |
| Bolt Treatment | Shot peened, hard turned/ground per mil-spec |
| Finish | QPQ nitrided carrier; TiN (titanium nitride/DLC) coated |
| Cam Pin | LanTac CP-R360 (17-4PH stainless, polished, H900 hardened) |
| Style | Full-auto |
| Shot Peening Standard | S110 shot, Almen Gage A-2 strip .006–.008 |
| Warranty | Lifetime |
| Origin | USA |
This bolt carrier group is chambered for 223/5.56 NATO and will function in any AR-platform upper receiver built to mil-spec dimensions, which covers the vast majority of modern AR-15 uppers on the market.
While M-SPEC follows military specification tolerances and dimensions, it upgrades the standard with QPQ nitriding (better corrosion resistance than Type M phosphate), a TiN diamond-like carbon coating, and a precision-machined stainless steel cam pin. These enhancements improve durability and ease of cleaning without raising the price to premium levels.
The LanTac M-SPEC BCG is engineered for reliable, durable operation. The reinforced carrier, quality bolt steel, and low-friction cam pin all support consistent performance across typical range and hunting applications. For specialized or extreme-duty needs, verify compatibility with your specific use case.
The carrier is QPQ nitrided, and the bolt and other external surfaces are coated with TiN (titanium nitride/diamond-like carbon), both of which resist corrosion and fouling significantly better than standard phosphate finishes.
Lantac
The LanTac M-SPEC BCG is a 223/556 bolt carrier group engineered to deliver solid mil-spec performance without the premium price tag. Built in the USA, this TiN-coated carrier strikes the balance that budget-conscious builders and shooters need: rock-solid reliability with thoughtful upgrades that lift it above basic military specification. If you're running an AR platform for range work, training, or hunting and want a dependable BCG that won't nickel-and-dime you, the M-SPEC line is exactly the kind of no-nonsense choice that keeps your rifle running when it matters.
The carrier itself is machined from 8620 steel, case hardened and precisely ground to mil-spec tolerances for flawless upper receiver fit. Instead of the standard Type M phosphate finish, LanTac applies QPQ nitriding for superior corrosion resistance and wear characteristics—a meaningful upgrade at a reasonable cost. The bolt is sourced from Carpenter 158 or 9310 steel, shot peened and hard turned per military spec, ensuring consistent ignition and longevity. Every M-SPEC BCG also ships with LanTac's proprietary CP-R360 domed cam pin, hand-polished from 17-4PH stainless steel and hardened to H900 condition; this precision-fitted component reduces friction and wear in your upper, extending service life and smoothing bolt cycling.
The TiN (titanium nitride) diamond-like carbon coating protects against corrosion and fouling, making field cleaning easier and bolt life longer. Shot peening is conducted to demanding standards (S110 shot, Almen Gage A-2 strip .006–.008), ensuring uniform strength and durability. Whether you're building a first rifle, running a range day special, or refreshing a workhorse, the M-SPEC BCG delivers American-made quality with the warranty backing to prove it.
| Caliber | 223/5.56 NATO |
| Carrier Material | 8620 Steel, case hardened, hard turned/ground |
| Bolt Material | Carpenter 158 or 9310 |
| Bolt Treatment | Shot peened, hard turned/ground per mil-spec |
| Finish | QPQ nitrided carrier; TiN (titanium nitride/DLC) coated |
| Cam Pin | LanTac CP-R360 (17-4PH stainless, polished, H900 hardened) |
| Style | Full-auto |
| Shot Peening Standard | S110 shot, Almen Gage A-2 strip .006–.008 |
| Warranty | Lifetime |
| Origin | USA |
This bolt carrier group is chambered for 223/5.56 NATO and will function in any AR-platform upper receiver built to mil-spec dimensions, which covers the vast majority of modern AR-15 uppers on the market.
While M-SPEC follows military specification tolerances and dimensions, it upgrades the standard with QPQ nitriding (better corrosion resistance than Type M phosphate), a TiN diamond-like carbon coating, and a precision-machined stainless steel cam pin. These enhancements improve durability and ease of cleaning without raising the price to premium levels.
The LanTac M-SPEC BCG is engineered for reliable, durable operation. The reinforced carrier, quality bolt steel, and low-friction cam pin all support consistent performance across typical range and hunting applications. For specialized or extreme-duty needs, verify compatibility with your specific use case.
The carrier is QPQ nitrided, and the bolt and other external surfaces are coated with TiN (titanium nitride/diamond-like carbon), both of which resist corrosion and fouling significantly better than standard phosphate finishes.
