Give your MIL-SPEC carbine a streamlined upgrade with the BATTLEARMS WORKHORSE 4-inch Free Float Rail M-LOK. Designed as a lightweight, slimline handguard, this compact rail combines practical attachment points with an uncluttered profile. Its free-float design and 4-inch length offer a purposeful option for compatible builds where a shorter handguard suits the setup.
The WORKHORSE M-LOK-compatible rail provides mounting positions at the 3, 6, and 9 o’clock positions, while skeletonized sections remove material where M-LOK slots are not used. A 1913 MIL-SPEC Picatinny rail runs along the 12 o’clock position and features a notched cut designed to match the BATTLEARMS upper receiver profile. Multiple rail lengths are available across the WORKHORSE line, letting builders select a configuration suited to barrel length and setup. This 4-inch model features 6061-T6 aluminum, a 1.36-inch internal diameter, and a Type III black hardcoat anodized finish. Check dimensions and compatibility with your carbine and components before installation.
- Product: BATTLEARMS WORKHORSE 4-inch Free Float Rail M-LOK
- Material: 6061-T6 aluminum
- Length: 4 inches
- Internal diameter: 1.36 inches
- Finish: Type III black hardcoat anodize
- Free-float handguard with M-LOK attachment system
- M-LOK mounting positions at 3, 6, and 9 o’clock
- Notched 1913 MIL-SPEC Picatinny rail at 12 o’clock
- Installation torque guidance: barrel nut 30–45 ft-lb; screws 10–15 in-lb
Choose the BATTLEARMS WORKHORSE 4-inch M-LOK rail for a compact, weight-conscious handguard with essential mounting options and a clean profile for compatible MIL-SPEC carbine builds.
