The Phase 5 Weapon Systems LOPROGAS Lo-Pro Gas Block is a compact, screw-style gas block engineered for AR-15 platforms that need a clean, low-profile setup. Machined from durable 4140 chromoly steel and finished in a mag phosphate coating, it is designed to fit barrels with a 0.750" gas block journal while maintaining a 0.95" low-profile outer dimension for easy clearance under modern handguards.

This Lo-Pro Gas Block replaces a traditional front sight base to allow the use of longer free-float forearms on carbine-length barrels, supporting streamlined builds for training, range use, and general-purpose rifles. Secured with two set screws, installation is straightforward and stable, and the design integrates smoothly with standard AR-15 gas systems. Backed by Phase 5’s reputation for precise machining and thoughtful design, it offers a reliable upgrade for shooters seeking consistent gas control in a minimalist package.

Key Features:

• Manufacturer: Phase 5
• Model: Lo-Pro
• Product Type: Screw Style Gas Block
• Material: 4140 Chromoly Steel
• Finish: Mag Phosphate
• Compatibility: Fits 0.750" AR-15 barrels
• Attachment: Two-screw set screw design