Guntec Air-LOK M-LOK Compression Free Float Handguard

The Air-LOK Series M-LOK Compression Free Floating Handguard is engineered for builders who want maximum rigidity, reduced weight, and a true monolithic top rail without unnecessary bulk. Made in the USA from 6061-T6 aluminum, the Air-LOK uses a compression lock system that slides over a proprietary barrel nut and clamps securely against the receiver using four locking screws.

This design creates a tight, rock-solid fit that resists rotation and flex, while allowing the handguard to sit flush against the upper receiver for a continuous Picatinny top rail. Extensive triangle and diamond skeletonized cuts reduce weight without sacrificing strength, making this an ideal choice for lightweight carbines, SBRs, and competition builds.

With M-LOK slots on three sides, integrated QD sling sockets, and a generous 1.32″ internal diameter, the Air-LOK series balances strength, airflow, and modularity across a wide range of barrel lengths.

Key Features

• US Made

• Compression lock free-float design

• Monolithic Picatinny top rail

• Precision machined from 6061-T6 aluminum

• Skeletonized cuts to reduce weight

• M-LOK slots on bottom, left, and right sides

• Integrated rear QD sling sockets (left & right)

• Tight receiver fit for improved alignment and rigidity

• Proprietary barrel nut included

• Heavy-duty construction without unnecessary mass

Available Length Variants

• 4"

• 5"

• 6"

• 6.75"

• 7"

• 9"

• 10"

• 12"

• 15"

• 16.5"

Available Color Options

• Black

• Flat Dark Earth

• Olive Drab

• Gold

• Red

• Blue

• Purple

• Silver

• Orange

• Grey

• Bronze

• Pink

Specifications (Series Overview)

• Material: Aluminum

• Material Grade: 6061-T6

• Finish: Anodized

• Mounting System: M-LOK

• Top Rail: Monolithic Picatinny

• Internal Diameter: 1.32"

• Caliber Compatibility:

  • 5.56

  • 9mm

Estimated Weights by Length (Including Barrel Nut)

Weights scale proportionally from manufacturer data and internal dimensions.

• 4" – ~6.2 oz

• 5" – ~7.1 oz

• 6" – ~8.0 oz

• 6.75" – ~8.6 oz

• 7" – ~9.0 oz

• 9" – ~10.4 oz

• 10" – ~11.3 oz

• 12" – ~12.6 oz

• 15" – ~13.2 oz

• 16.5" – ~14.1 oz

(Weights may vary slightly by anodized color and production batch.)

Why Choose the Air-LOK Series?

The Air-LOK system is ideal for builders who want:

• A true free-float handguard

• Superior lock-up without timing issues

• Lightweight performance with structural integrity

• Clean monolithic rail alignment for optics and lasers

• A wide range of lengths and color customization

It delivers the rigidity of heavier rails while maintaining the handling characteristics of a lightweight build.