I'm currently looking at this barrel

 

http://www.stagarms.com/product_info.php?cPath=15_40&products_id=329

 

Since I don't want the front sight post, and would prefer a low-profile alternative, I was looking at this gasblock.

 

http://www.stagarms.com/product_info.php?cPath=15_37&products_id=335

 

I was just wondering if they were compatible. The gasblock says it fits .750 diameter barrels, but I didn't see where the diameter was mentioned on the barrel up there. I'd like to get these, but I don't want to buy two parts that aren't compatible with one another. Therefore, I ask for your assistance. I emailed Stag a little over a week ago, but haven't heard back. I figure someone here would know better than I.

 

Also, seeing as how the barrel is threaded, though there is no comp attached, is it legal to ship to my home? When I get PK90 to do the work for me, I'm going to get some sort of brake attached.

 

Also, ordering just the barrel in this manner, are there any other parts I need to attach it to the A3 upper? I don't plan on doing that myself, but I know I need to bring them to PK90 for assembly.

 

Thanks, as always, for the help!

Are you going with a free floating handguard? Is that why you are going with a low profile gas block?

 

Look at the middle rifle. How much different than this are you looking to build?

 

Still need to know if anyone knows this.

Guess it's the standard .750" Apparently only A1s are .625, and bulls are .938

Give Stag a call. I found their sales people to be very helpful.

You are correct, .750 is the standard diameter for AR barrels. Also, if you have just the barrel and the upper receiver, with no lower receiver you're fine. You need to have whatever rail system/forearm system with you before the compensator is installed, as each rail system has a different barrel nut and will NOT fit over the compensator once it is permanently attached.

Give Stag a call. I found their sales people to be very helpful.

 

I've emailed them over a week ago. Ironically, I feel bad calling because I'm sure they're very busy, and I don't want to bother them with inane questions.

You are correct, .750 is the standard diameter for AR barrels. Also, if you have just the barrel and the upper receiver, with no lower receiver you're fine. You need to have whatever rail system/forearm system with you before the compensator is installed, as each rail system has a different barrel nut and will NOT fit over the compensator once it is permanently attached.

 

Haha, I posted that because when I googled that question, this thread was one of the first results. I figured I'd put that there in case anyone else had that question in the future. Fortunately, the barrel I'm looking at is sold without a comp. I'll likely buy a legal comp, and have it installed when I get the rest of the upper assembled. I've put off buying an upper for just this reason.