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.
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- All Us Made
- 9/45 Acp Upper Receiver
- Us 7″ Gen 2 Air-Lok Series M-LOK Handguard With Barrel Nut & Hardware (Gt-7alc-G2)
- 5/8 X 24 Micro Slim Line Flash Cone (Mcone-Fh-S-308)
- Kit Does Not Come Assembled
- 45 Acp Complete Bcg
- 7.5″ .45 Acp 1:16 Twist Contour 4150 Barrel
- Anodized Black Finish
- Complete Upper Kit Contains:
- MIL-SPEC Charging Handle
- Crush Washer
ED SMITH –
GREAT QUALITY ! FLAWLESS 1 THANKS GUNTEC USA !!!!
Blanche Ballard –
The AR-15 .45 ACP Cal Complete Upper Kit (Gen 2) with the AIR-LOK Handguard truly stands out as a top-tier addition for any firearm enthusiast. Having had the chance to handle and assemble this kit, it’s clear that Guntec USA has prioritized quality and functionality in every aspect. The finish on the upper receiver feels incredibly durable, with a sleek, matte appearance that resists scratches and has a professional look. The Gen 2 design brings noticeable improvements, especially in machining precision and ease of installation.
The AIR-LOK Handguard is a game-changer—solid, lightweight, and with a design that offers excellent grip and versatility. Its attachment system provides a secure fit that feels rock solid, making it easier to customize or add accessories without worry. The internal machining appears impeccable, ensuring smooth operation and consistent feeding, which is essential during extended shooting sessions.
This complete upper kit offers great value for those looking to build or upgrade a reliable .45 ACP platform. The internal components speak to American craftsmanship, and the fit and finish make it clear that it’s built to last. It’s compatible across a wide range of AR-15 platforms, and the detailed instructions included made assembly straightforward, even for those new to building.
Beyond just aesthetics and performance, the kit really shines in terms of practical use. The .45 ACP caliber is a favorite for close-range target shooting and self-defense, offering manageable recoil and impressive stopping power. With this upper kit installed, handling and maintaining accuracy feels intuitive and controlled. The build quality ensures consistent cycling, and the overall weight balance feels just right, with no unnecessary bulk.
For value-conscious buyers who want to create a durable, American-made build, this complete upper kit is a solid investment. Whether you’re a seasoned builder or a dedicated collector, it delivers both reliability and a touch of premium design. Based on my experience, I’d definitely recommend it for anyone looking to expand their AR platform with a purpose-built, high-quality .45 ACP upper. It’s a well-made, versatile piece that elevates the shooting experience while offering peace of mind through quality craftsmanship.