Titanium 1.125-28 Alpha Direct Thread Mounts

$95.00

"Titanium 1.125-28 Alpha Direct Thread Mounts" added to wishlist
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Description

These direct thread mounts allow you to use your 1.125-28 threaded Alpha (also “Harvester .300″) pattern suppressor in direct thread configuration.  Titanium Alpha mounts install/remove with our Alpha mount wrench, a 1-1/16 or 27mm 12-point wrench/socket, adjustable pin wrench or hook type spanner wrench.  Our Titanium Alpha direct thread mounts will accommodate AR length tenons of .625″ (5/8”, 16mm).   Unless noted with “MR” for Muzzle Registering, titanium Alpha direct thread mounts are through-threaded (barrel shoulder registering); through-threaded  these will NOT register on the muzzle.   If you need a muzzle registering Alpha direct thread mount that we do not have in titanium, please see if we offer it in our ultralight aluminum version:  https://www.eccomachine.net/product/1-125-28-alpha-ultralight-aluminum-direct-thread-mounts/

M16x1 LH MR mount is designed to work with the Kriss Vector models having that thread.  The internal shoulder depth is .41″

M13.5×1 LH MR mount is compatible with the Sig MPX & MPX-K having that thread.  Note: it will engage the muzzle, NOT the taper; we do not offer a 13.5×1 LH mount which utilizes the taper.  The internal shoulder depth is .43″.

 

Titanium Alpha Direct Thread Mount specs:

Material: 6Al-4V gr. 5 titanium
Length: .64″ (.59 for MR)
Male thread length: .4″ (.35 for MR)
Flange thickness: .15″
Flange diameter: 1.2″
Weight: .6-.9 ounces
Internal thread: Choose option, all are through-threaded unless otherwise noted.
External thread: 1.125-28

Installation and removal can be accomplished with several tools, including the non-marring polymer wrenches we offer, a pin wrench,  spanner wrench, or a 1-1/16″ 12 point wrench or socket.  These mounts were designed around our suppressors but will work in any suppressor with an in-spec 1.125-28 Alpha female socket.  Some suppressors, namely SilencerCo pistol suppressors, have a counterbore that may limit accessibility to the wrench features.

In Stock Natural products ship within 1-2 business days. While we usually have SOCOM Black on hand to ship within 1-2 business days, color selections may add up to 10 business days to ship time.

Before placing your order, please reference the provided dimensions and compare with your application to ensure this product fits so as to avoid return shipping and restocking costs.

 

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, 5/8-32, M13 x .75, M14x1LH, M15x1, 11/16-24, M13.5×1 LH MR, M16x1 LH MR

2 responses to “Titanium 1.125-28 Alpha Direct Thread Mounts”

    Ryan Shipes
    August 26, 2025
    Man this is nice and well made. Couldn’t be happier.
    steven03214
    April 9, 2025
    This works great to adapt my Rugged Obsidian 45 to .450 Bushmaster. The only issue I had is that the lugs are so shallow it was difficult to remove from the suppressor.

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