Yankee Hill Machine Co Gas Block Riser, Mount, Black, Picatinny YHM-230 DEMO/USED

The Yankee Hill Machine YHM-230 gas block riser is a picatinny-mounted accessory that solves a common AR-15 build challenge: getting your front sight into the same optical plane as your optic. If you're running a YHM railed gas block and want to co-witness with a same-plane front sight system, this riser bridges the height gap without requiring a complete gas block swap. It's straightforward hardware that lets you maintain sight redundancy on a modern, rail-equipped setup.

Built from aircraft-grade aluminum and hardcoat anodized to military spec, the YHM-230 is engineered to handle the rigors of the range and field. Its matte black finish is durable and won't glint in sunlight—details that matter whether you're training hard or hunting. The compact 2.0-inch length keeps your front sight positioned logically along the rail without excess bulk, and at just 1.344 ounces, it won't throw off your rifle's balance or add meaningful weight to your upper receiver.

This is a demo/used unit, so you're getting YHM quality at a value. If you're building or upgrading an AR with a YHM gas block and want a lower-1/3 or absolute co-witness setup, this riser is the direct solution—no adapters or workarounds needed.

Key Features

• Aircraft-grade aluminum construction for strength and reliability
• Hardcoat anodized matte black finish to military specifications
• Picatinny rail mount for secure attachment to YHM railed gas blocks
• Lightweight design (1.344 oz) minimizes impact on rifle dynamics
• Compact 2.0-inch length for practical sight positioning

Specifications

Frequently Asked Questions

Will this riser fit my YHM gas block?

Yes—this is designed to mount directly to any YHM railed gas block via picatinny attachment. Make sure your gas block has a full-length top rail.

What front sight systems work with this riser?

The YHM-230 is engineered for same-plane front sight systems, particularly YHM's Q.D.S. lineup, though it will accept any picatinny-mounted front sight compatible with its height and rail format.

Will I achieve co-witness with an optic using this riser?

Yes—the riser's purpose is to position your front sight in the same optical plane as your mounted optic, enabling co-witness for sight redundancy. The exact co-witness height (lower-1/3, absolute, etc.) depends on your optic mount and sight choice.

What condition is this unit in?

This is a demo/used item. It has been test-fitted or used but remains fully functional. Check product images for condition details or contact us for specifics.