Dyna systems muzzlebrakes

Sangrun Hunter · Mar 18, 2004

For the newbies that might not know about Dyna systems. They have taps/dies for threading barrels and breaks themselves.

They will do custom brakes too in case you want one for that Yugo SKS to replace the grenade launcher tube.

http://dynasystems-ltd.com/GunFile/Products.html

http://dynasystems-ltd.com/GunFile/MB.html

Sheik Yerbouti · Mar 18, 2004

SRH,

Do you have a chart that shows what thread to use for what muzzle diameter?

Sangrun Hunter · Mar 18, 2004

Nope, I don't have that, but if you ask around here someone will know.

DrugRunR · Apr 1, 2004

The problem with them is shipping delays.

I ordered a TAT 2 weeks ago.
They said it would ship same day and take 3 to 5 days via Airborne to arrive.
I called yesterday and after a 4 minute hold was informed my package was ready to go and would ship out today. I still have to wait 3 to 5 days for it to arrive.

Sangrun Hunter · Apr 1, 2004

DrugRunR said:
The problem with them is shipping delays.

I ordered a TAT 2 weeks ago.
They said it would ship same day and take 3 to 5 days via Airborne to arrive.
I called yesterday and after a 4 minute hold was informed my package was ready to go and would ship out today. I still have to wait 3 to 5 days for it to arrive.

Hmm? That sucks! Didn't know they were like that.

scubadvr · Apr 1, 2004

I have done business with them and have found them to be very good in terms of service. I think they do need some work on their web site, could not purchase through it, and telephone personel (usually no one to answer the phone). Their products are excellent. If you can get a hold of them, then they can answer most questions. They custom made an adapter for one of my Romies because it has the muzzle threads cut down. Jack

DrugRunR · Apr 3, 2004

My order was just for the TAT, a $12 part.
I suspect that if it was for a complete system they would of been a little quicker with shipping.

CHARLES

Kevin_M4 · Apr 3, 2004

Good link, I sure am eyeballing that 1/2x28 kit for one of my AR's, gonna bookmark that.
thx

JA545 · Apr 3, 2004

The standard size for AK-47/AKM rifle barrel threads is 14x1mmLH. The standard size for M-16/AR-15 rifle barrel threads is 1/2x28.
So unthreaded barrel semi auto AK rifles imported to the US are going to have barrels that are 14mm/.551" in diameter or barrels that have had the threads turned off leaving the barrel 12.3mm/.480" to 13mm/.512" in diameter.
The 1997-1998 imported Romanian 7.62x39mm rifles,milled receiver MAK-90,milled receiver MAK-91,and Norinco Hunter models never had the barrels threaded so they are 14mm/.551" in diameter.
The 1997-1998 imported Romanian 5.45x39mm rifles and SAR-2 rifles have 12.7mm-12.9mm/.500"-.508" diameter barrels.
Maadi rifles with unthreaded barrels have the barrels theads turned off and vary 12.3mm-13mm/.480"-.512".
I have threaded several Maadi,Romanian CUR-2 5.45x39mm,and SAR-2 rifles that had barrels 12.7mm-12.9mm/.500"-.508" with a 1/2x28 threading kit. Then bought AK-74 style muzzle brakes made for AR-15 rifles.

Sangrun Hunter · Apr 3, 2004

Just a thought about MAK-90's. I have one and the threads were turned off. They are still slightly there and barrel diameter has been reduced. Some MAK's like mine were inbetween models that were moded on the fly to import them.

I guess mine was 56S at one time and then moded?

JA545 · Apr 5, 2004

What is the diameter of your MAK-90's barrel now?

Sangrun Hunter · Apr 5, 2004

JA545 said:
What is the diameter of your MAK-90's barrel now?

Being at work I can't measure it, but I think it's 12.5 or there about?

meyerse · Apr 8, 2004

I've looked into this too for a .223 mak. You can rethread with a 1/2-28 (which is AR-15 threads I belive) then you can use a thread adaptor from say www.facamerica.com to go to 22mm or to 24mm .

Evil_Walks · Apr 10, 2004

meyerse said:
I've looked into this too for a .223 mak. You can rethread with a 1/2-28 (which is AR-15 threads I belive) then you can use a thread adaptor from say www.facamerica.com to go to 22mm or to 24mm .

Dynasystems also produces a US AK74 style brake in 1/2x28 with a .223 hole or you can have them make a custom .223 brake threaded 14x1 for the threaded 5.56 MAKs.

Sangrun Hunter · Apr 11, 2004

BTW:

I measured my MAK barrel with the stripped off threads. It is 13 mm and a touch more.

I was wrong about the 12.5 measurement.

JA545 · Apr 13, 2004

How much is a touch more?

Sangrun Hunter · Apr 13, 2004

It was around a 1000th or 2.

Basically 13 mm or 1/2 inch.

I'll try to get the precise measurement tonight instead of forgetting it like I did before.

Sangrun Hunter · Apr 14, 2004

13.1 MM or .5075 inches

There I remembered

Dyna systems muzzlebrakes

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