Geissele Super Gas Block Low Profile Set Screw for AR-15/LR-308 Standard Barrel - 0.750" ID, Steel, Black

The Geissele Super Gas Block is a low-profile gas block engineered for AR-15 and LR-308 builds that demand reliability under high round counts. If you're running a free-floating handguard or building a precision rifle, this set-screw block fits the standard .750" barrel journal and tucks cleanly underneath most modern rail systems—no ugly gap, no compatibility headaches.

Built from 17-4 precipitation-hardening stainless steel, this gas block resists corrosion and handles sustained firing without degradation. Geissele's precision investment-cast construction means tight tolerances and consistent performance across thousands of rounds. The set-screw design keeps the block locked in place without requiring a proprietary removal tool, making adjustments and cleaning straightforward in the field or at the bench.

Whether you're dialing in a competition rifle, assembling a hunting build, or upgrading an existing platform, the Geissele Super Gas Block pairs reliability with clean aesthetics. It won't steal sight lines, won't interfere with your handguard, and won't fail you when it matters.

Key Features

• Low-profile design fits under free-floating handguards and modern rail systems
• 17-4 precipitation-hardening stainless steel construction for durability and corrosion resistance
• Precision investment-cast for tight tolerances and consistent performance
• Set-screw retention—simple, reliable, field-adjustable
• Fits standard .750" barrel journal on AR-15 and LR-308 platforms

Specifications

Frequently Asked Questions

Will this gas block fit under my free-floating handguard?

Yes. The Geissele Super Gas Block is specifically designed as a low-profile block to sit underneath most modern free-floating rail systems without interference.

What barrels does this fit?

This block is sized for standard .750" barrel journals found on most AR-15 and LR-308 rifles. Verify your barrel's journal diameter before purchase to ensure proper fit.

How does the set-screw retention work?

The set-screw design allows you to lock the block securely to your barrel without special tools. You can adjust or remove it with standard hex keys, making field maintenance and cleaning straightforward.

Is this stainless steel block corrosion-resistant?

Yes. The 17-4 precipitation-hardening stainless steel resists rust and corrosion, maintaining performance through wet conditions and extended storage.