Str8shooter

Well this has gotten interesting. It's not 1 1/4 or 1 5/16(too small) and 1 1/2 is too big. Good times trying to sort through em. I ran out of sizes so I may have to go to a big crescent wrench. ugh.

Thanks all. I will let you know how it goes once the new barrel comes in next week. I really wanted to upgrade the barrel to the BSF CF red barrel. How did you all find the accuracy on the factory stick? I haven't even put rounds down it.

Thanks Boot, would you happen to have a caliper handy to measure the flats on you barrel nut? Did you have the free float handguard? I'd really like to get this off with the least amount of issue. I personally like the handguard that come's with it. So cold instead of heat? I'm kind of surprised by that. did you use a large crescent wrench or an actual box werench? BTW I can verify that the echo 2 trigger will not fit in the PSA lower. LOL I have two.

Ok so Im expecting this to be a rehash but here goes. I have a PSA Gen2 PA10 18" Midlength .308 WIN 1:10 Stainless Steel 15" M-Lok Upper with BCG & CH - 516447164 that I am replacing the barrel on. I am going to a BSF carbon fiber barrel. I have seen all sorts of horror stories online about them. I have contacted them and have gotten various answers such as 1 1/3 or 30MM open end wrench. I've also seen online 1 1/8. Anyone done this on the ar10 from them? Any help would be appreciated. I'd rather only buy once when it comes to the wrench.