Guntec USA has been manufacturing AR-15, AR-308 and AR 9mm accessories since 1989. Our goal is to distribute excellent quality, at an economical value.
- Made for 7.62X51 / 308 Cal
- 9310 Hardened Steel Bolt, 17-4 Stainless Steel Firing Pin (Heat treated to H900 Condition)
- The group comes fully assembled with properly torqued and staked gas key
- Nitride Treated
- 8620 carrier and gas key.
- Made in the USA
- HPT/MPI Tested and Marked
- Hardened extractor S7 tool steel.
Mitch Vega –
This AR .308 Cal Nitride Bolt Carrier Group MIL-SPEC BCG offers a solid upgrade for anyone serious about their rifle’s performance. From the moment I unpacked it, the quality was immediately noticeable—attractive, well-machined, and finished with a smooth nitride coating that not only looks great but also promises durability and corrosion resistance.
The design aligns perfectly with MIL-SPEC standards, which is a relief for those of us who prioritize compatibility and reliable performance. It fits seamlessly into my AR-10 platform, and during use, I’ve noticed a smooth cycling feel, thanks to the precise machining. The nitride finish provides an extra layer of protection, even after several extended shooting sessions, without any signs of wear or peeling.
One of the things I appreciate most about this BCG is its balance of quality and value. It’s apparent that guntecusa.com takes pride in producing American-made accessories, and it shows in the craftsmanship. The internal surfaces are polished well, reducing friction, which contributes to smoother operation and less fouling over time—especially important when running higher rounds or aftermarket loads.
The MIL-SPEC compatibility means it works flawlessly with other standard parts, making it a worry-free upgrade. Plus, the weight feels substantial but not overly heavy—perfect for maintaining good balance and control during prolonged shooting sessions. It’s a reliable choice whether you’re building a new rifle or upgrading an existing one.
Overall, this AR .308 Cal Nitride Bolt Carrier Group MIL-SPEC BCG stands out as a dependable, high-quality component that enhances consistency and longevity. It’s worth investing in for any serious rifle owner wanting to ensure optimal performance and durability. While it’s priced slightly higher than generic options, the craftsmanship and materials justify the investment. A solid recommendation for builders and enthusiasts looking to outfit their AR-10 or AR-308 with a premium, American-made BCG.