Save some money on your next rifle build and choose the Battle Arms Development® WORKHORSE® M-LOK® 15" Free-Float Rail with .750 Gas Block Upgrade Kit. The WORKHORSE low-profile steel gas block was designed to be a low-profile gas block for the masses and is constructed to fit under most handguards. This .750 gas block features durable steel construction with an anodized corrosion-resistant finish. The WORKHORSE Free-Float Rail features M-LOK mounting options at 3, 6, and 9 o'clock positions offering plenty of space for weapon-mounted accessories while skeletonized areas help reduce weight. Plus, a continuous Picatinny top rail adds extra space for iron sights and optics. This handguard features 6061-T6 aluminum construction with a corrosion-resistant Type III hard-coat anodized finish.