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.
- US Made
- Triangle / Diamond Skeletonized Cuts Throughout Handguard to Reduce Weight
- Rail Slides Over Barrel Nut, And Is Compressed Down Against Receiver With 4 Screws
- Internal Diameter: 1.32″
- Anodized Black Finish
- T6 Aluminum Body
- Proprietary Steel Barrel Nut Included
- M-LOK Slots On 3 Sides of Handguard (Bottom, Left & Right Sides)
- 4″ Length
- AIR-LOK Series – Compression Lock Down Design
- Total Weight Including Barrel Nut Is 6.5 oz!!
- Tight Fit Up Against Receiver, Which Allows For A Monolithic Picatinny Top Rail
- Heavy Duty
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Clarence Howell –
The 4″ AIR-LOK Series M-LOK Compression Free Floating Handguard with Monolithic Top Rail in anodized black is a standout addition for anyone serious about their AR-platform build. Its compact 4-inch length makes it ideal for creating a lightweight, maneuverable rifle without sacrificing strength or stability. The quality of the machining is impressive—smooth surfaces, tight tolerances, and a solid anodized finish that seems built to withstand rough use and the elements.
What really sets this handguard apart is its innovative AIR-LOK locking system. It provides a snug, wobble-free fit without the need for traditional barrel nuts or complex installation. For a collector or builder, this means less fuss during assembly and a more consistent zero when shooting. The free-floating design, combined with the tight monolithic top rail, ensures excellent accuracy potential, especially when mounting optics or other accessories.
The M-LOK slots are thoughtfully placed, allowing for versatile attachment points for lights, grips, and other accessories. The Black anodized finish adds a sleek, tactical look that complements any modern build. Despite its minimalist appearance, the construction feels incredibly durable—no flex, no creaking, just a solid component that enhances the overall performance of the rifle.
Having installed this handguard on an AR-15 project, I can attest to its ease of installation. The AIR-LOK system requires precision, but the included instructions are clear, and the fit is superb. Once mounted, it feels very solid—nothing moves or rattles. The monolithic top rail is a real bonus, providing a seamless platform for optics and backup sights.
From a value perspective, this handguard offers excellent quality at a competitive price point, especially considering it’s American-made. It’s a reliable choice for anyone wanting to upgrade their rifle with durable, precision-machined accessories built for long-term use.
Overall, the 4″ AIR-LOK Series M-LOK Compression Free Floating Handguard is highly recommended for AR-15 enthusiasts who demand quality, ease of installation, and a clean, functional design. Whether you’re customizing a personal build or upgrading a duty rifle, it’s a component that combines form, function, and American craftsmanship in a way that’s hard to beat.
Bert Reed –
The 4″ AIR-LOK Series M-LOK Compression Free Floating Handguard with Monolithic Top Rail in anodized black is an impressive piece of gear that truly stands out for its quality and thoughtful design. Having used it on my AR-15 build, I can confidently say it offers a robust and durable platform that enhances both accuracy and aesthetics. The monolithic top rail provides a seamless, rigid surface for mounting optics or accessories, which really helps improve sighting stability during shooting sessions.
What struck me most is the craftsmanship — the anodized black finish feels matte and resistant to scratches, maintaining its sleek appearance even after heavy use. The material has a sturdy, lightweight feel that doesn’t add unnecessary weight to the rifle, yet feels solid enough to withstand harsh weather and rough handling. The M-LOK slots are precisely machined, allowing for flexible accessory placement without wobble or looseness. This keeps everything securely mounted, which is vital during extended shooting or tactical situations.
Installation was straightforward thanks to the well-designed locking system. The AIR-LOK compression feature ensures a tight fit against the upper receiver, eliminating any movement or rattle that can sometimes occur with other handguards. It’s reassuring to have that peace of mind knowing the handguard is securely anchored, helping maintain shot consistency over multiple rounds.
Another aspect that adds to its appeal is the versatility it offers in a compact 4-inch size. It’s perfect for build variants that prioritize maneuverability or for those wanting a sleek profile while maintaining the ability to attach a variety of accessories via M-LOK slots. The finish matches well with other American-made components, giving my build a cohesive look that’s both tactical and professional.
Given its quality, precision, and American craftsmanship, the 4″ AIR-LOK Series M-LOK Compression Free Floating Handguard offers excellent value for the price. It’s a reliable upgrade for anyone looking to enhance their AR platform with a durable, lightweight, and well-designed handguard. In my experience, it’s a worthwhile investment that combines performance, style, and American-made quality. Definitely recommended for enthusiasts who want a dependable accessory that won’t disappoint.