Bravo Company (BCM) 6-Position Mil-Spec AR-15/LR-308 Receiver Extension Buffer Tube Stock Hardware Kit - Aluminum MatteBravo Company$57.95
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Bravo Company
The Bravo Company MK2 Mil-Spec receiver extension buffer tube is a precision-engineered AR-15 and LR-308 component built to exacting military specifications. If you're building or upgrading an AR platform rifle and need a reliable, combat-proven buffer tube that plays nice with standard-profile stocks, the BCM MK2 delivers the fit and durability serious shooters depend on. Machined from 7075-T6 aluminum and hard-coat anodized to Mil-A-8625F Type III Class 2 standards, this tube handles the demands of the range, hunting, or duty use without compromise.
The BCM MK2 is engineered to mil-spec dimensions, meaning it has a slightly smaller diameter where your stock mounts compared to commercial-profile tubes. This matters: it ensures rock-solid compatibility with USGI, BCM Gunfighter, Colt, LMT, SOPMOD, VLTOR, Stag Arms, and other mil-spec stocks. If your AR build includes any of those brands, you're in good hands. The aluminum construction keeps weight down while the anodized finish resists corrosion and abuse in the field.
One critical detail: BCM MK2 receiver extensions require an M16 rifle action spring and BCM's specific MK2 buffer. Standard carbine or rifle buffers won't work with this tube, so factor that into your build plan. The upside is that when you run the correct components, you get a system engineered as a unit for reliability and performance. This tube also works on most AR-10 platforms, giving you flexibility across your rifle collection.
Whether you're assembling your first AR or swapping components on an established rifle, the BCM MK2 receiver extension delivers the quality and precision you'd expect from Bravo Company—no compromise, no guesswork.
| Brand | Bravo Company (BCM) |
| Product Type | Receiver Extension / Buffer Tube |
| Material | 7075-T6 Aluminum |
| Finish | Hard-coat Anodized (Mil-A-8625F Type III Class 2), Matte |
| Compatibility | AR-15, M16, M4, Most AR-10 / LR-308 Platforms |
| Stock Profile | Mil-Spec |
| Required Components | BCM MK2 Buffer, M16 Rifle Action Spring |
The BCM MK2 is designed for mil-spec stocks, including USGI, BCM Gunfighter, Colt, LMT, SOPMOD, VLTOR, and Stag Arms models. The slightly smaller mil-spec diameter ensures a tight, wobble-free fit with any stock manufactured to those specifications.
No. The BCM MK2 receiver extension requires the specific BCM MK2 buffer and an M16 rifle action spring. Standard carbine and rifle buffers are not compatible and will not function correctly with this tube.
Yes. The BCM MK2 receiver extension is compatible with most AR-10 and LR-308 platforms, in addition to AR-15 and M16 rifles.
The BCM MK2 features a matte hard-coat anodized finish per Mil-A-8625F Type III Class 2 specifications, which resists corrosion and wear while minimizing glare.
Bravo Company
The Bravo Company MK2 Mil-Spec receiver extension buffer tube is a precision-engineered AR-15 and LR-308 component built to exacting military specifications. If you're building or upgrading an AR platform rifle and need a reliable, combat-proven buffer tube that plays nice with standard-profile stocks, the BCM MK2 delivers the fit and durability serious shooters depend on. Machined from 7075-T6 aluminum and hard-coat anodized to Mil-A-8625F Type III Class 2 standards, this tube handles the demands of the range, hunting, or duty use without compromise.
The BCM MK2 is engineered to mil-spec dimensions, meaning it has a slightly smaller diameter where your stock mounts compared to commercial-profile tubes. This matters: it ensures rock-solid compatibility with USGI, BCM Gunfighter, Colt, LMT, SOPMOD, VLTOR, Stag Arms, and other mil-spec stocks. If your AR build includes any of those brands, you're in good hands. The aluminum construction keeps weight down while the anodized finish resists corrosion and abuse in the field.
One critical detail: BCM MK2 receiver extensions require an M16 rifle action spring and BCM's specific MK2 buffer. Standard carbine or rifle buffers won't work with this tube, so factor that into your build plan. The upside is that when you run the correct components, you get a system engineered as a unit for reliability and performance. This tube also works on most AR-10 platforms, giving you flexibility across your rifle collection.
Whether you're assembling your first AR or swapping components on an established rifle, the BCM MK2 receiver extension delivers the quality and precision you'd expect from Bravo Company—no compromise, no guesswork.
| Brand | Bravo Company (BCM) |
| Product Type | Receiver Extension / Buffer Tube |
| Material | 7075-T6 Aluminum |
| Finish | Hard-coat Anodized (Mil-A-8625F Type III Class 2), Matte |
| Compatibility | AR-15, M16, M4, Most AR-10 / LR-308 Platforms |
| Stock Profile | Mil-Spec |
| Required Components | BCM MK2 Buffer, M16 Rifle Action Spring |
The BCM MK2 is designed for mil-spec stocks, including USGI, BCM Gunfighter, Colt, LMT, SOPMOD, VLTOR, and Stag Arms models. The slightly smaller mil-spec diameter ensures a tight, wobble-free fit with any stock manufactured to those specifications.
No. The BCM MK2 receiver extension requires the specific BCM MK2 buffer and an M16 rifle action spring. Standard carbine and rifle buffers are not compatible and will not function correctly with this tube.
Yes. The BCM MK2 receiver extension is compatible with most AR-10 and LR-308 platforms, in addition to AR-15 and M16 rifles.
The BCM MK2 features a matte hard-coat anodized finish per Mil-A-8625F Type III Class 2 specifications, which resists corrosion and wear while minimizing glare.