Phase 5 Weapon Systems Lo-Pro Gas Block .750" Clamp Mag Phosphate 4140 Chromoly

The Phase 5 Weapon Systems Lo-Pro Gas Block is a clamp-on, low-profile gas block designed to replace your existing fixed front sight on an AR-15 upper. By ditching the factory front sight tower, it opens up additional rail space at the front of the rifle and allows installation of a rifle-length forearm on a carbine-length gas system, or simply gives your build a cleaner, more streamlined look.

Machined from rugged 4140 Chromoly Steel and finished in a corrosion-resistant Mag Phosphate coating, this Lo-Pro block weighs just 1.8 oz and measures a compact 0.90" wide by 1.48" tall, small enough to tuck inside most free-float and drop-in handguards. The .750" clamp-style design secures to the barrel without set screws that can mar the finish, making installation and removal quick and repeatable. Proudly made in the USA, the Phase 5 Lo-Pro Gas Block is a straightforward, durable upgrade for AR-15 builders who want a clean, low-profile look without sacrificing reliability.