The Ergo Grips .750 Low Profile Adjustable Gas Block (brand part no. 4822) lets an AR-15 owner fine-tune their rifle’s gas system down to a full shutoff, a level of control a fixed gas block simply can’t offer. Ergo machines the block from 4140 chromoly steel with chamfered edges and finishes it in a durable Nitride/Melonite QPQ coating, and it’s designed to fit under Ergo’s own Modular and SuperLite rail systems as well as most other manufacturers’ free-float handguards. Adjustments are made via a 10-32 set screw, with a 4-40 brass retaining screw locking the setting in place without needing thread-locking compound. The block retains the same height and profile as a standard Ergo low-profile gas block, so it drops in without changing your handguard fit, and it’s made and machined entirely in the USA. Among our AR-15 gas systems, this adjustable block suits builders running a suppressor or an over-gassed setup who need to tune reliability without swapping parts.

Key Specifications

• The material is 4140 chromoly steel, CNC machined.
• The finish is Nitride/Melonite QPQ for durability.
• The internal diameter is 0.750 inch.
• The adjustment allows full shutoff with zero movement once set.
• Adjustments are made via a 10-32 set screw with a 4-40 brass retaining screw.
• The edges are chamfered for a semi-press slip-on fit.
• The weight is approximately 2 ounces.
• Two set screws are included; a gas tube roll-pin is not included.
• Manufactured and machined in the USA.

Frequently Asked Questions

Can this gas block shut off gas flow completely? Yes, it adjusts all the way down to a full shutoff with no movement once locked in place.

Does it fit under most handguards? Yes, it’s built to fit under Ergo’s own rail systems as well as most other manufacturers’ free-float handguards, retaining the standard low-profile height.

Is a roll-pin included? No, it accepts a standard gas tube roll-pin, but one is not included.

Buy the Ergo Grips .750 Adjustable Gas Block

A genuinely fine-tunable gas block machined from chromoly steel, this Ergo block gives builders real control over their rifle’s gas system. Order it from our Lubbock, Texas gun shop for fast shipping.