Midwest Industries167529077
Midwest Industries Handguard Free Float Alumn 4.25'' Black$167.95
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Availability: In Stock
The Battle Arms Development Workhorse 4 free float handguard is a lightweight, no-nonsense rail system built for AR platform carbines that need to shed unnecessary weight without sacrificing mounting versatility. At just 4 inches long, this compact handguard is purpose-built for short-barrel setups, pistol-length gas systems, and shooters who prioritize maneuverability in tight spaces—whether you're running drills at the range, hunting in thick cover, or building a truck gun that doesn't eat up real estate.
Built from 6061 T6 aluminum with a Type 3 black hardcoat anodize finish, the Workhorse 4 delivers the durability you'd expect from a free float design while keeping weight minimal. M-LOK mounting points at the 3, 6, and 9 o'clock positions give you flexibility to add lights, lasers, grips, or sling mounts exactly where you need them. The top 12 o'clock position features a MIL-SPEC Picatinny rail, so you can mount optics, charging handles, or other accessories without adapter rings. Battle Arms Development's approach here is refreshingly honest: skeletonized sections reduce weight where M-LOK isn't used, and the rail is notch-cut to match modern upper receivers—every ounce counts when you're building a fighting carbine.
Installation is straightforward with standard torque specs (30–45 ft-lbs on the barrel nut, 10–15 in-lbs for screws). The 1.36-inch internal diameter maintains compatibility with standard AR barrel nuts and free float tube dimensions. If you're upgrading a short-barrel AR, SBR, or pistol-caliber carbine and want a handguard that does the job without the bloat, the Workhorse 4 is worth a close look.
| Brand | Battle Arms Development |
| Product Name | Workhorse 4 Free Float Handguard |
| Material | 6061 T6 Aluminum |
| Length | 4 inches |
| Internal Diameter | 1.36 inches |
| Finish | Type 3 Black Hardcoat Anodize |
| Attachment Type | M-LOK |
| Top Rail | MIL-SPEC Picatinny |
| Barrel Nut Torque Spec | 30–45 ft-lbs |
| Screw Torque Spec | 10–15 in-lbs |
The Workhorse 4 is designed for MIL-SPEC AR-15 and AR-15-pattern carbines with standard barrel nuts and free float dimensions. The 1.36-inch internal diameter accommodates most common AR uppers and barrels.
Yes. The Workhorse 4 features a MIL-SPEC Picatinny rail on the top for mounting optics, charging handles, or other Picatinny-compatible accessories. M-LOK slots at the 3, 6, and 9 o'clock positions allow you to install lights, lasers, grips, and sling mounts using standard M-LOK adapters.
Yes, the Workhorse 4 is a free float design, meaning it does not make contact with the barrel, which can improve accuracy by eliminating harmonic interference from barrel movement.
The 4-inch length is intended for short-barrel rifles, pistol-length gas systems, and compact AR builds. For longer barrels, Battle Arms Development offers the Workhorse in 6.7-, 9.5-, 13-, and 15-inch lengths.
Availability: In Stock
The Battle Arms Development Workhorse 4 free float handguard is a lightweight, no-nonsense rail system built for AR platform carbines that need to shed unnecessary weight without sacrificing mounting versatility. At just 4 inches long, this compact handguard is purpose-built for short-barrel setups, pistol-length gas systems, and shooters who prioritize maneuverability in tight spaces—whether you're running drills at the range, hunting in thick cover, or building a truck gun that doesn't eat up real estate.
Built from 6061 T6 aluminum with a Type 3 black hardcoat anodize finish, the Workhorse 4 delivers the durability you'd expect from a free float design while keeping weight minimal. M-LOK mounting points at the 3, 6, and 9 o'clock positions give you flexibility to add lights, lasers, grips, or sling mounts exactly where you need them. The top 12 o'clock position features a MIL-SPEC Picatinny rail, so you can mount optics, charging handles, or other accessories without adapter rings. Battle Arms Development's approach here is refreshingly honest: skeletonized sections reduce weight where M-LOK isn't used, and the rail is notch-cut to match modern upper receivers—every ounce counts when you're building a fighting carbine.
Installation is straightforward with standard torque specs (30–45 ft-lbs on the barrel nut, 10–15 in-lbs for screws). The 1.36-inch internal diameter maintains compatibility with standard AR barrel nuts and free float tube dimensions. If you're upgrading a short-barrel AR, SBR, or pistol-caliber carbine and want a handguard that does the job without the bloat, the Workhorse 4 is worth a close look.
| Brand | Battle Arms Development |
| Product Name | Workhorse 4 Free Float Handguard |
| Material | 6061 T6 Aluminum |
| Length | 4 inches |
| Internal Diameter | 1.36 inches |
| Finish | Type 3 Black Hardcoat Anodize |
| Attachment Type | M-LOK |
| Top Rail | MIL-SPEC Picatinny |
| Barrel Nut Torque Spec | 30–45 ft-lbs |
| Screw Torque Spec | 10–15 in-lbs |
The Workhorse 4 is designed for MIL-SPEC AR-15 and AR-15-pattern carbines with standard barrel nuts and free float dimensions. The 1.36-inch internal diameter accommodates most common AR uppers and barrels.
Yes. The Workhorse 4 features a MIL-SPEC Picatinny rail on the top for mounting optics, charging handles, or other Picatinny-compatible accessories. M-LOK slots at the 3, 6, and 9 o'clock positions allow you to install lights, lasers, grips, and sling mounts using standard M-LOK adapters.
Yes, the Workhorse 4 is a free float design, meaning it does not make contact with the barrel, which can improve accuracy by eliminating harmonic interference from barrel movement.
The 4-inch length is intended for short-barrel rifles, pistol-length gas systems, and compact AR builds. For longer barrels, Battle Arms Development offers the Workhorse in 6.7-, 9.5-, 13-, and 15-inch lengths.
SKU: 167529256 • Weight: 0.22oz
SKU: 167529256 • Weight: 0.22oz