Phase 5 Weapon Systems Lo-Pro Gas Block AR-15 .750" Set Screw Mag Phosphate 4140 Chromoly Steel

The Phase 5 Weapon Systems Lo-Pro Gas Block is a low-profile, set-screw style gas block designed for AR-15 platforms. It replaces the factory front sight base to deliver a clean, low-profile mounting solution that allows a rifle-length free-float handguard to be installed on a carbine-length barrel.

Machined from 4140 Chromoly Steel and finished in a rugged Mag Phosphate coating, this block installs on a standard 0.750" barrel using a secure set-screw attachment. The compact footprint measures approximately 0.90" wide and weighs just 1.8 oz, adding minimal weight to your upper while providing the corrosion resistance and durability expected of a quality AR-15 component.

By eliminating the bulk of a fixed front sight tower, the Lo-Pro Gas Block frees up valuable rail space for modern free-float handguards, red dot optics, back-up iron sights, lights, and lasers. Proudly made in the USA, this is a straightforward drop-in upgrade for AR-15 builders looking to clean up their upper receiver and modernize their rifle.