Battle Arms Development AR-15 4" Workhorse M-LOK Handguard | Black Anodized

Battle Arms Development AR-15 4″ Workhorse M-LOK Handguard | Black Anodized

The Battle Arms Development AR-15 4″ Workhorse M-LOK Handguard is an ultra-compact free float handguard engineered for AR pistol builds, ultra-short barreled rifles, and compact AR-15 configurations where minimal weight and maximum maneuverability are critical. Built with the same premium machining and rugged durability found throughout the WORKHORSE lineup, this compact M-LOK handguard delivers lightweight performance and modern modularity in an extremely streamlined package.

Precision machined from aircraft-grade aluminum and finished in durable black hardcoat anodizing, the Battle Arms Development 4″ Workhorse Handguard provides excellent rigidity while maintaining an exceptionally lightweight profile. Shooters frequently search for compact AR-15 handguards for PDW builds, micro AR pistols, and short-barreled rifle setups where reducing front-end bulk significantly improves weapon handling and close-quarters maneuverability.

The 4-inch configuration is optimized for extremely short gas system setups and compact barrel lengths while still providing enough rail space for essential accessories such as weapon lights, hand stops, and compact vertical grips. Its slim ergonomic profile allows for improved control and comfort without adding unnecessary size to the rifle.

Integrated M-LOK attachment slots at the 3, 6, and 9 o’clock positions provide direct mounting capability for modern accessories while eliminating the excess weight associated with traditional quad rail systems. Skeletonized machining cuts throughout the handguard further reduce unnecessary mass while maintaining structural strength and rigidity under hard use.

The continuous MIL-STD-1913 Picatinny top rail provides a stable mounting platform for optics, backup iron sights, and laser aiming devices while maintaining proper alignment with compatible upper receivers. Battle Arms Development’s notch-cut top rail profile further trims weight and contributes to the streamlined appearance of the WORKHORSE series.

With an internal diameter of approximately 1.36″, the Battle Arms Development AR-15 4″ Workhorse M-LOK Handguard accommodates most low-profile gas blocks commonly used in compact AR-15 builds. The included barrel nut and mounting hardware ensure secure installation and long-term reliability even under aggressive firing schedules.

Designed, manufactured, and tested in the USA, the Battle Arms Development Workhorse series delivers premium lightweight free float performance for shooters building compact AR-15 platforms that demand durability, modularity, and refined handling characteristics.

Key Features:

• 4″ compact free float AR-15 handguard
• Precision machined from aircraft-grade aluminum
• Durable black hardcoat anodized finish
• M-LOK mounting slots at 3, 6, and 9 o’clock positions
• Ultra-lightweight slim profile design
• Skeletonized machining cuts reduce unnecessary weight
• Continuous MIL-STD-1913 Picatinny top rail
• Precision notch-cut top rail profile
• Compatible with most low-profile gas blocks
• Internal diameter approximately 1.36″
• Ideal for AR pistols, PDWs, and compact SBR builds
• Includes barrel nut and mounting hardware
• Made in the USA

Installation Torque Recommendations:

• Barrel Nut: 30–45 ft-lbs
• Mounting Screws: 10–15 in-lbs