Vepr 12 Choke and Muzzle brake

[Beiruty]

It is a "nut" job, the old nut is too big, now looking for thinner nut or shims.
Added a Vepr Choke and before the Muzzle Brake. What do you recommend?

Note: Brake cleaner would remove the Cheap Russian paint (see photos)
un-indexed


indexed

[Beiruty]

I am contemplating filing the bottom of the Muzzle brake till it index correctly

[jason812]

I wonder if you can find a bevel aka crush washer large enough to fit. Similar to how an AR flash hider is indexed. It will cost you more than a Chinese milling machine (file) though.

Search McMaster Carr or Fastenal.

[Beiruty]

I wonder if you can find a bevel aka crush washer large enough to fit. Similar to how an AR flash hider is indexed. It will cost you more than a Chinese milling machine (file) though.

Search McMaster Carr or Fastenal.

Can I find those at home depot or other hardware store? Or should I order from online?

[Bitter Clinger]

Crush washers do reportedly pose some risk from an alignment standpoint if you have a close tolerance brake. You might consider these:

https://precisionarmament.com/product-c ... u-washers/

[jason812]

I wonder if you can find a bevel aka crush washer large enough to fit. Similar to how an AR flash hider is indexed. It will cost you more than a Chinese milling machine (file) though.

Search McMaster Carr or Fastenal.

Can I find those at home depot or other hardware store? Or should I order from online?

You can look at the stores but I doubt anything that size is in stock locally even in a Fastenal store. You will probably find fender washers but I would be surprised to find shims.

Just a quick search and a guess of 20mm ID shows that even finding a shim with a small OD that won't stick out past the brake might be difficult.

Will this work? http://www.carolinashooterssupply.com/0 ... ocknut.htm

Bitter, that's a 12ga brake, those shims might be a little small.

[Beiruty]

I wonder if you can find a bevel aka crush washer large enough to fit. Similar to how an AR flash hider is indexed. It will cost you more than a Chinese milling machine (file) though.

Search McMaster Carr or Fastenal.

Can I find those at home depot or other hardware store? Or should I order from online?

You can look at the stores but I doubt anything that size is in stock locally even in a Fastenal store. You will probably find fender washers but I would be surprised to find shims.

Just a quick search and a guess of 20mm ID shows that even finding a shim with a small OD that won't stick out past the brake might be difficult.

Will this work? http://www.carolinashooterssupply.com/0 ... ocknut.htm

Bitter, that's a 12ga brake, those shims might be a little small.

It is thinner from the one I have, it might work. I ordered from the same seller but did not add this washer. If I install the one I have, it would take a lot of threading and the MB would have only 2-4 threads to hang on. That is surely something I do not like.

I am thinking to get a sanding paper and take out some 0.2mm at a time until it indexes correctly. All the way in, it needs some 35 to 40 degres to index, and the thread is M22x0.75mm. I guess 0.75mm is linear travel of the MB per 1 rotation. Is that correct?

I could also use the choke as "jamming nut", however, it already fixed with good coat of Loctite blue. In addition, I wanted to have no space between the barrel inner surface and the Choke inner surface. It is now flush from the inside.

[jason812]

Yes, the .75mm is linear travel per 1 full rotation. If my math is correct, you only need to remove around .002-.003" A good flat surface and some fine sand paper might do the trick. Just don't take off too much, you can't put it back on.

[Beiruty]

Yes, the .75mm is linear travel per 1 full rotation. If my math is correct, you only need to remove around .002-.003" A good flat surface and some fine sand paper might do the trick. Just don't take off too much, you can't put it back on.

[Beiruty]

Some two 180 sandpapers and little patience, I got it indexed flush and screwed all the way against the choke