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.
- All US Made
- 5.56 Upper Receiver
- 5.56 Charging Handle
- Pistol Length Gas Tube
- 1/2 X 28 Crush Washer
- Kit Does Not Come Assembled
- 5.56 Complete BCG
- Forward Assist Asssembly
- Steel Low Pro .750 Gas Block
- 1/2 X 28 A2 Birdcage
- Complete Upper Kit Contains:
- 5.56 Ejection Door Assembly
- US 7″ M-LOK Handguard With Barrel Nut & Hardware (GT-7MLK)
- 7.5″ 5.56mm 1:7 Twist Contour 4150 Barrel
- Anodized Black Finish On Aluminum Parts
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Bryant Newman –
Absolutely impressed with the AR-15 5.56 Cal Complete Upper Kit (Pistol Length) (Ultra light M-LOK Hg) from guntecusa.com. This kit truly lives up to its reputation for quality craftsmanship and functional design. The first thing that caught my eye was the ultra-lightweight construction — it’s noticeably lighter than other upper assemblies I’ve handled, which makes a big difference during extended shooting sessions. The M-LOK rail is incredibly sleek and sturdy, offering ample space for customization and accessories without adding unnecessary bulk.
The fit and finish are outstanding; the anodized finish feels durable and resistant to scratches, maintaining its sleek look even after some serious use. The barrel’s precision machining ensures consistent accuracy, and the pistol-length design makes it versatile for both home defense and sport shooting. The assembly was straightforward, fitting perfectly onto my lower, with no loose spots or alignment issues, which speaks volumes about the attention to detail during manufacturing.
One of the highlights of this upper kit is the compatibility with American-made components, providing peace of mind that every part adheres to high-quality standards. It’s a reliable option for anyone looking to build or upgrade their AR-15 with a focus on lightweight performance. Modifications and accessories slide on smoothly, thanks to the well-designed M-LOK system. The kit also includes everything needed for quick installation, making it an excellent choice for enthusiasts who prefer a hassle-free assembly.
In terms of value, this complete upper offers a great balance between performance and cost. You’re getting a premium product that rivals more expensive options but without the hefty price tag. It’s clearly designed for durability and precision, making it a solid investment for shooters who demand reliability without sacrificing maneuverability.
Overall, this upper kit from Guntec USA’s lineup is a fantastic addition for anyone building or upgrading an AR-15 platform. It combines lightweight comfort, rugged durability, and excellent aesthetics. Highly recommend for both seasoned shooters and those new to building their own firearms — it’s a dependable piece that won’t let you down.