Yankee Hill Machine YHM-4400 sRx Q.D. Adapter | 1-3/8×24

The Yankee Hill Machine sRx Q.D. Adapter (YHM-4400) is a low-profile quick-detach mounting interface engineered to attach to industry-standard 1-3/8″ x 24 (HUB) threads. It employs an internal taper seal ahead of the threads to lock a compatible suppressor in place and reduce gas and debris accumulation on the threaded area. The adapter is intended to be used with YHM sRx muzzle devices and adds minimal length to a suppressor setup while maintaining a compact footprint. It is built for users who favor a clean, serviceable mounting solution.

Applications: range use for suppressor-equipped training and target work; competition or precision training where fast, repeatable attach/detach of a suppressor is desirable.

Product Specifications

• The manufacturer is Yankee Hill Machine.
• The model is listed as sRx.
• The manufacturer’s part number is YHM-4400.
• The product type is specified as Mount.
• The fitment is specified for Yankee Hill SRX components.
• The adapter attaches to 1-3/8″ x 24 (HUB) threads.
• The finish is listed as Black Oxide.
• The color is listed as BLACK.
• The product is designed to be used with YHM sRx muzzle devices including 4405, 4405-MB, 4401-MB, and 4445.
• An additional feature is a Quick Detach SRX Mount.
• The listed dimension block is 1.35 X 3.35 X 5.45.
• The listed height is 1.3500.
• The listed width is 3.3500.
• The listed length is 5.4500.
• The UPC is 841812101499.

This low-profile sRx Q.D. Adapter provides a compact, repeatable interface for users who want a minimal-length mounting solution when pairing YHM sRx muzzle devices and compatible suppressors. The internal taper seal is intended to preserve the threaded interface from gas and debris, and the adapter’s design focuses on consistent, tool-free mounting while keeping added bulk to a minimum.