1.125-28 Alpha Direct Thread Mounts




This adapter allows you to use your 1.125-28 threaded Alpha (also Harvester .300) pattern suppressor in direct thread configuration. Installs/removes with a 12-point wrench/socket, pin wrench or hook type spanner wrench. The standard (short) version has a 1/2″ deep threaded bore for most fixed barrel pistols and carbines, the long version has a .625″ threaded bore for AR length barrel tenons All versions are barrel shoulder register, including metric; these will NOT register on the muzzle

The M13.5×1 LH mount has the 25° Sig taper

Material: 17-4 H900 stainless steel
Length: .64″ (.74″ for M13.5×1 LH Sig Taper mount)
Male thread length: .4″
Flange thickness: .15″
Flange diameter: 1.2″
Weight: 1.1-1.3 ounces
Internal thread: Choose option

External thread: 1.125-28

Installation and removal can be accomplished with several tools, including a pin wrench or spanner wrench, but they are designed with a 1-1/16″ 12 point wrench or socket in mind.

In stock Natural finish or Black adapters ship 1-2 business days. Other color options add up to 10 business days.
Want to know more about Alpha pattern threads? Learn more about it here (Scroll to bottom): https://www.eccomachine.net/our-faqs/

Additional information

Alpha DT Muzzle Thread

.578-28, 1/2-28, 1/2-36, 5/8-24, M13.5x1LH Sig Taper, M14x1LH, M15x1, M16x1LH

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1.125-28 Alpha Direct Thread Mounts
1.125-28 Alpha Direct Thread Mounts
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