CTGunner82

Looks like I'm finally getting an AR-10 B series upper to go along with my lower. The reference guide at https://308ar.com/ar-10-308-ar-compatibility-reference-guide/ says that I need to find a barrel with an Armalite compatible barrel extension and must use an Armalite bolt carrier and bolt. I've read in other forums that as long as you have a properly matched barrel, bolt, and carrier then you can use either setup in either Armalite or DPMS style receivers. What is the opinion around here, or is it not a matter of opinion? Can I buy a 6.5 Creedmoor barrel with matching bolt from JP, along with their bolt carrier, and use all that in my AR-10 B series rifle? Or am I stuck with a barrel from Armalite? I don't see any other companies making barrels with the Armalite style extension, especially not in 6.5 Creedmoor.

I'm planning on getting a 6.5 Creedmoor barrel. I'm assuming 6.5 should function and feed properly with the Armalite B series magazines I have. Has anybody used these mags for 6.5 with success before? I considered getting another after I got off the phone. Shipping was free because it is over $100, so if I decided to get another one it won't cost me any more. I'll just have to make the decision fairly soon to be safe.

Yeah the blem upper was about half the price of what is listed on their website, so it's not too bad.

Just got off the phone with Armalite. They have a few cosmetically blemished stripped uppers with white waves in the anodizing. I bought one so I should be all set. They guy I spoke with said that they will probably make more B series uppers at some point, but they've been saying for years that they're coming soon and they never seem to come. I wanted to play it safe and get what I can now so I'm not SOL for life.

I just called LaRue. They only have DPMS style or their proprietary style. The don't have any AR-10 B series compatible components.

Yes, what is the model number on the Aero lower? That will determine whether it is A or B series.

But they're closed this exact moment! J/K I guess that's a good idea.

Not a single one of those is in stock. Neither is the stripped upper on their site. That's why I'm wondering how hard it will be to get one.

PS : Aero Precision informed me they do no make any more B series, in fact no more Armalite style AR-10 stuff from them since 2012 or so.

Hi, all. I could use some help if I ever have a chance to get a proper upper assembly to go with my commie state registered preban lower and magazines. Yes, both the lower receiver and each of my magazines are irreplaceable to me here in Connecticut. I've come to learn that I have an Armalite B series style lower from Aero Precision and the proper Armalite mags with it, but Armalite has switched to the newer A series and it looks like the B series is at least very hard to get. I'm hoping the B series isn't completely discontinued. I need to get an upper receiver to go with this lower if I ever want to get this rifle built, preferably one that will support a free floating handguard and barrel. Armalite lists an AR-10 B series upper at https://www.armalite.com/product/10002001-ar10-b-series-upper-receiver-assembly/ . They say to get part number 10002000 if you want to use a free-float rail, but 10002000 is not on their website. I'd love to get a stripped B series upper so I can match it with a 6.5 Creedmoor barrel, but I'm wondering if I'll need to buy any old rifle or upper that I can find at this point. How hard is it to find B series components these days?