Steyr Scout threaded barrel pitch?

[bikemutt]

I found a Steyr Scout rifle chambered for .308 which I have incoming to my FFL dealer. I bought a threaded barrel model as I'd heard barrel removal and re-installation is a factory-only service meaning my gunsmith would not be able to thread a non-threaded barrel for me.

I haven't been able to learn what the thread pitch is on the rifle, tried about everything short of calling Steyr. I plan to use the rifle suppressed, my can is setup for 5/8-24 thread pitch.

Wondering if anyone might know what the Steyr Scout 308 thread pitch is?

I know the Steyr Aug uses a metric pitch which has me guessing this one does as well.

 

[dprice3844444]

try an ar-15 flash hider,if it fits,it's 1/2 x 28

 

[rcmodel]

A .308 can't be a 1/2"x28.

Industry standard is that for .223.
.308 standard is 5/8"x24.

But I have no idea if Steyr adheres to U.S. Industry standards?
I'd almost bet they do though.

Unless it's 1x18mm???
But the barrel is too slim for that, I think?

rc

 

[bikemutt]

I called Steyr this morning, the guy said 1/2"x20. I have a gut feel he missed the part where I told him it is a 308 rifle.

 

[bikemutt]

Well, I emailed them and got a response; 1/2" x 20.

 

[rcmodel]

Must be the barrel is too light / small diameter for standard .308 5/8"x24 muzzle threads???

It is unusual though.

The various threading standards for various calibers are based on preventing someone screwing a .223 muzzle device on a larger bore rifle.

Hard to squeeze a .308" bullet through a .224" hole in the end of the barrel!

I guess 1/2"x20 is plenty different enough nobody will be screwing a AR-15 Comp on one by mistake though!

rc

 

[bikemutt]

I called YHM who made my suppressor (Phantom Ti, QD), asked them if they can make me a custom QD brake with that thread, or an adapter.

There are off-the-shelf adapters to go from 1/2x20 to 1/2x28, then to 5/8x24, just don't want this to look like something Fred Flintstone cobbled together with Barney while drinking Dyno-Mite whiskey at the Stone Bar & Grill

 

[back40]

it's interesting. while trying to find you an answer, it seems that the threaded barrels are of thicker contour than the non-threaded.

was YHM willing to work with you? if not, i'm sure you can find someone to make you that specific adapter.

 

[rcmodel]

if they can make me a custom QD brake with that thread

Might be prudent to wait until you got it in your hot & sweaty hands before you do anything!!!

Take some measurements of the actual thread diameter & pitch on the rifle first before you jump in with both feet!

rc

 

[bikemutt]

Agreed rc, you never know until the fish is on the scale what it weighs.

 

[200Apples]

.
Nothing to add save for my hearty congrats! for acquiring a Steyr Scout.

Want.

 

[bikemutt]

Well, I should have the rifle next week but, while waiting:

Heard nothing back from YHM, doesn't surprise me.

Silencer Shop discovered that YHM makes a 1/2"x28 threaded flash hider QD mount for my suppressor. A 1/2"x20 to 1/2"x28 thread adapter is readily available.

Silencer Shop also recommended I talk to TROSUSA about a custom thread adapter. Mark at TROS offered to make a 1/2"x20 to 5/8"x24 for a very fair price. The advantage to me being that I can then use the YHM muzzle brake QD mount instead of the flash hider. I have the muzzle brake mount on all my other suppressor host 30 cal rifles, I find it works 85% to 90% as well as any of the premium brakes I've tried.

I've ordered up parts for both so that shooting the rifle will be the final arbiter.