Warning

 

Close
Confirm Action

Are you sure you wish to do this?

Cancel Confirm
AR15.COM
Armory Sponsor
4/27/2026 6:34:54 PM EDT
For anyone shooting thier SP45A3 suppressed.  What is your solution to the seemingly lengthy threaded muzzle.   The piston assembly of the Hux 45M bottoms out on the muzzle.  Some say that's to be expected, but I can't get a straight answer from Stribog nor Huxwrx.  I'm leaning towards 3-lug, but I'm curious.  1) Anyone else run into this problem 2) If not, or if you have resolved it, what was your solution?
4/27/2026 8:04:03 PM EDT
[Last Edit: willi3d][Edited] [#1]
I run my SP45A3 suppressed.  I started first with the Rugged Obsidian 45 using the piston and fixed barrel spacer and then since moved to a 3-lug setup using a SiCo 3 lug muzzle device, KVP 3 lug adapter, and Mojave 45.

I think my 3 lug is indexed off the muzzle.  The problem on the Stribog is that there is a fairly long distance between the big shoulder and the end of the muzzle, and only part of that length is threaded.  Unless you get a piston or adapter with deep threading that can reach all the way to the that shoulder, it’s going to index off the muzzle.  I haven’t had any issues.
4/28/2026 9:12:20 AM EDT
[#2]
I made a spacer to fill the gap between the shoulder on the barrel and the Xeno mount for my Mohave 45, no issues. Faces on the spacer are parallel within a couple of tenths.
4/29/2026 6:35:10 PM EDT
[Last Edit: zentradi][Edited] [#3]
Most .45 threaded barrels in .578x28 don't use a shoulder, so muzzle devices mount off the face of the barrel.  That's normal, guessing it goes back to the available metal on 1911 barrels.  

Stribog also had a problem of the face of the barrel/ threading not being concentric to the bore in .578x28 , so they were shipping out spacers for free to align off the shoulder of the barrel as well.  This will get rid of the gap, if  you can mount everything concentric with the spacers.

Repair / Warranty Service
Address
2150 Whitfield Ave
Building B
Sarasota, FL 34243

Contact Information
Phone: 941-549-8388 ext 111
9 am until 5pm EST Mon-Friday
[email protected]

https://www.grandpowerusa.com/company-information/
If you are putting a lot of effort into arguing with me, you are probably really just wasting your time, sorry.
4/29/2026 9:22:34 PM EDT
[Last Edit: JJL0325][Edited] [#4]
.578x28 locking nut from Down Range Products behind my SilencerCo 3-lug


4/30/2026 9:26:27 PM EDT
[#5]
Thank you all! I now how some things to attempt and verify.  When my tri lug adapter arrives I'll first try indexing off the muzzel and verify alignment.  If that's a no-go, I'll try either or both of the other options mentioned.
5/1/2026 11:06:40 PM EDT
[#6]
Are there cans that mount directly with no issues?
BikerNut:
Normal people like motorcycles. Real people like motorcycles.

People who don't like motorcycles are just... weird.
5/16/2026 1:26:42 PM EDT
[#7]
I shot my Hux 45 on it since others said that the thread pitch is normally indexed off the muzzle.  All went well, I still purchased a lock nut and tri lug though.

Sign up to continue the discussion

Create a free account to share your thoughts, follow topics, and connect with the AR15.COM community.

Already a member? Sign In

Armory Sponsor