Midwest Industries AR-15/LR-308 .750" Steel Matte Upper Height Gas Block

If you're running a flattop AR-15 or LR-308 and want your front sight, optic, and accessories all living on the same plane, the Midwest Industries .750" Steel Matte Upper Height Gas Block is purpose-built to make that happen. This isn't just a gas block—it's a rail-mounted component that solves a real problem on modern patrol rifles and precision builds: the height mismatch when you try to co-witness iron sights to your upper receiver rail. The integral Picatinny rail lets you stack accessories without the offset headaches of traditional blocks, and the extra elevation means you can run flip-up front sights that actually align with your receiver-mounted optics.

Built from 4140 billet steel and precision-machined to exacting tolerances, this block is engineered to handle serious round counts without peening out or losing zero. The matte finish resists glare and shows no finish wear like polished steel does after thousands of trigger pulls. Designed to fit .750" O.D. barrels—the standard diameter on most modern AR uppers—it secures with three setscrews that lock the block tight to your barrel. If you're building a rifle-length handguard setup with a matching Picatinny rail, you'll get a continuous rail system running from your receiver all the way forward, giving you unlimited flexibility for mounting lights, lasers, or additional iron sights.

This is a no-nonsense component for shooters who care about rail real estate and sight alignment. Whether you're setting up a duty-ready carbine, a precision rifle, or just upgrading an existing platform, the height and rail integration solve problems that cheaper blocks can't.

Key Features

• Integral Picatinny rail for direct accessory mounting
• Upper height design enables co-witnessing with receiver rail sights
• 4140 billet steel construction for durability under high round counts
• Matte finish resists glare and hides wear
• Three set-screw retention for secure barrel mounting
• Compatible with .750" O.D. barrel diameter (AR-15, LR-308)

Specifications

Frequently Asked Questions

Will this gas block work with my AR-15 upper receiver?

Yes, it's designed for flattop AR-15 and LR-308 uppers. It requires a .750" O.D. barrel to fit properly.

Can I co-witness iron sights with my optic using this block?

The upper height of the integral rail is specifically designed to allow co-witnessing with receiver-mounted optics and sights, so your sight picture stays on the same plane as your upper rail accessories.

What handguard will work with this gas block?

You'll need a Picatinny rail handguard that matches the .750" barrel diameter to create a continuous rail system from receiver to gas block.

How secure is the set-screw retention?

Three set-screws lock the block directly to your barrel, providing solid, repeatable retention. Proper torque and lock-tight ensure it stays put through thousands of rounds.