Jump to content


Photo
- - - - -

Picked up a Mak90, can't figure out the muzzle threads


  • Please log in to reply
4 replies to this topic

#1 mini14jac

mini14jac

    Member

  • Contributor
  • Pip
  • 90 posts

Posted 28 December 2015 - 06:20 PM

Bought a rough looking Mak90 and started making it 922r compliant.
When I bought it, the barrel was threaded for a muzzle brake, which I thought was a plus at the time.
Bought a Tapco slant brake, but it slips right on.
 
Tried an AR15 flash hider. It will start on there, but it appears to have 36 threads per inch, RH.
I tried a 1/2x36 flash hider for a 9mm AR pistol.
It will make it almost two turns then stop.
 
It's not 1/2x28, it's not 1/2x36, and it's too small for a 14x1LH slant brake.
 
At this point, I'm considering silver soldering or welding a brake on.
 
Any ideas?
 


#2 Spacehog

Spacehog

    Citizen

  • Contributor
  • PipPipPipPip
  • 1,942 posts
  • Gender:Not Telling

Posted 28 December 2015 - 08:31 PM

That is tough without seeing. Most of the Mak 90s imported had the muzzle turned down. In many cases, they were turned down the minimum or less of the thickness needed to thread 14X1. Unless someone else comes up with another suggestion, I think you have covered the common caliber threads, and the plan to permanently attach or go without may be the only option left.

#3 G O B

G O B

    Grumpy Old Bastard

  • Contributor
  • PipPipPipPipPip
  • 10,866 posts
  • Gender:Male
  • Location:Cen TX

Posted 29 December 2015 - 10:21 AM

A $7 Harbor freight mike and a ruler with a fine metric/standard scale will give you the thread and body size of the muzzle.


Freelance Philosopher and Professor Emeritus, School of Hard Knocks and Sharp Blows to the Head

Be yourself, for if you are NOT yourself, then who the hell are you?

"so is the soap they use to brainwash you environmentally safe?" (Bucky Katt)


#4 mini14jac

mini14jac

    Member

  • Contributor
  • Pip
  • 90 posts

Posted 29 December 2015 - 02:30 PM

I put a thread gauge on it.

I was wrong about the 36 threads.

(Should have taken notes and not gone from memory.)

It's 1/2-32.

 

Looks like one option is a shoulderless adapter from Precision Armament.

Would convert from 1/2-32 to 5/8-24 and then I could put a .308 flash hider on it.

I don't want a giant brake on here, was actually hoping to put a slant brake on it.

May just get a thread protector.

 

Really more hassle than I was looking for.

Not sure why someone picked that particular thread.



#5 mini14jac

mini14jac

    Member

  • Contributor
  • Pip
  • 90 posts

Posted 19 January 2016 - 05:17 PM

 

Looks like one option is a shoulderless adapter from Precision Armament.

Would convert from 1/2-32 to 5/8-24 and then I could put a .308 flash hider on it.

 

That's what I did.

Ended up pretty nice.

 

Mak90%20brake1_zpslt0sdp9t.jpg






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users