Otter Creek Arms Ocl-842 Otb Flash Hider Raw Heat Treat 5/8X24

The Otter Creek Arms OTB Flash Hider in raw heat treat is a one-piece muzzle adapter built for shooters running suppressor-compatible setups on non-standard barrels. This 5/8x24 threaded unit bridges the gap between OPS 12th pattern mounts—like the OCM5 or AEM5—and barrels that fall outside typical suppressor compatibility windows. If you've got a custom build with a barrel that's .75" or less in outside diameter and at least 2.05" of exposed barrel measured from the shoulder, this adapter lets you mount quality silencers without expensive custom collar work or barrel modifications.

Forged from H900 heat-treated 17-4 stainless steel, the OTB Flash Hider is engineered for durability in precision rifle and tactical applications. The raw heat-treat finish offers a clean, industrial aesthetic while maintaining corrosion resistance typical of quality firearms hardware. For shooters who prefer a low-profile solution that doesn't require gunsmithing, this is a practical alternative to custom barrel work when integrating modern suppressors into older or non-standard platforms.

Installation is straightforward: thread it onto your 5/8x24 barrel, and you're ready to attach your compatible suppressor mount. No special tools, collars, or modifications needed. Whether you're building a precision rifle with salvaged components or retrofitting a unique barrel profile, Otter Creek's approach simplifies what could otherwise be a costly custom job.

Key Features

• One-piece muzzle adapter for OPS 12th pattern mounts (OCM5, AEM5, and compatible units)
• H900 heat-treated 17-4 stainless steel construction
• Raw heat-treat finish
• Accommodates barrels with .75" or less outside diameter
• Requires minimum 2.05" of exposed barrel measured from the shoulder
• 5/8x24 thread pitch for direct barrel installation
• No custom collars or barrel modifications required

Specifications

Frequently Asked Questions

Will this work with my suppressor mount?

The OTB Flash Hider is designed for OPS 12th pattern suppressor mounts, including the OCM5 and AEM5 models. If your suppressor uses one of these mount patterns, this adapter will interface with it. Confirm your mount pattern before purchasing.

Do I need custom barrel work to install this?

No. This adapter threads directly onto your barrel's 5/8x24 threads without requiring custom collars, special modifications, or gunsmithing—as long as your barrel meets the diameter and length requirements.

What barrels is this compatible with?

The OTB Flash Hider fits barrels with 5/8x24 threads, an outside diameter of .75" or less, and at least 2.05" of exposed barrel length measured from the shoulder. Verify your barrel dimensions before purchase.

What's the difference between raw heat treat and black nitride finishes?

Both finishes protect the 17-4 stainless steel from corrosion. Raw heat treat has a natural, uncoated appearance, while black nitride adds a dark coating. The choice is aesthetic and personal preference; both offer the same material durability.