Yankee Hill 4445MB24 sRx Q.D. Muzzle Brake Short Black Phosphate Steel with 5/8"-24 tpi for sRx Adapters

The Yankee Hill 4445MB24 sRx Q.D. muzzle brake is a short, low-profile muzzle device engineered for shooters who want clean aesthetics without sacrificing functionality. Threaded 5/8"-24 TPI, this brake is the anchor point of Yankee Hill's sRx suppressor mounting system—a quick-detach interface that eliminates timing and shimming headaches while keeping your suppressor setup compact and lightweight. If you're building or upgrading a rifle with suppressor-ready threads and want a no-fuss, no-wobble mounting solution, this is the piece that makes the sRx system work.

The design centers on simplicity and durability. Inside the brake sits an internal taper seal that locks suppressors in place with a gas-tight fit, preventing debris and carbon from building up on threads—a common maintenance headache with traditional muzzle device mounting. The brake itself adds minimal length (1.6875 inches) and weight, making it ideal for hunters, precision shooters, and anyone running a short-barreled rifle or shotgun who wants a compact suppressed setup. The black phosphate steel finish handles recoil and the elements without ceremony.

This brake pairs exclusively with the YHM sRx Adapter (sold separately), which threads onto the standard 1-3/8" × 24 HUB interface. Once that adapter is mounted, your suppressor attaches via the Q.D. system with zero guesswork. It's built for permanent or temporary barrel mounting, depending on your needs—no moving parts, no shims, no timing tools required. If you run a suppressor on centerfire rifles or pistols and want a streamlined, robust mounting solution, the sRx brake is worth a hard look.

Key Features

• Short, low-profile design minimizes length and weight added to barrel
• Internal taper seal locks suppressors tight and prevents thread fouling
• No shimming or timing required—quick detach and go
• 5/8"-24 TPI thread for common suppressor-ready centerfire barrels
• Black phosphate steel construction for corrosion resistance and durability
• Can be used permanently attached or temporarily mounted
• Part of the larger YHM sRx System for seamless suppressor integration

Specifications

Frequently Asked Questions

What suppressor mounting system does this brake use?

The Yankee Hill 4445MB24 is part of the YHM sRx (Suppressor Rx) System. It works with the YHM sRx Adapter, which mounts to standard 1-3/8" × 24 HUB threads. Once the adapter is attached to your barrel, suppressors connect via quick detach without shimming or timing.

Will this fit my rifle's threads?

This brake is threaded 5/8"-24 TPI, which is standard for many centerfire rifle and pistol barrels. Verify your barrel's thread pitch before ordering—Yankee Hill offers this brake in other thread patterns (5/8" × 32 and 11/16" × 24) if your barrel requires a different size.

Do I need anything else to use this muzzle brake?

Yes. This brake must be paired with the YHM sRx Adapter (model YHM-4400), which is sold separately. The adapter threads onto your barrel's existing 1-3/8" × 24 HUB interface, then the brake and your suppressor attach via quick detach to that adapter.

How much length does this add to my barrel?

The brake itself is 1.6875 inches long. On a barrel with 0.6" of threaded area, it adds approximately 1.675 inches to overall barrel length—one of the shortest options in the sRx lineup for compact suppressed setups.