Pattern but there's not a set parameter for max and minimum measurements. They'e simply not the same plug and play of a proper mil-pec AR.
Well, there is no mil spec... But specs for DPMS pattern parts are just that. And in this day and age of quality CNC manufacturers... There is no particular part or particular manufacturer that I ever heard of being out of spec. Even mix and matching bolts and barrels... They head space.Pattern but there's not a set parameter for max and minimum measurements. They'e simply not the same plug and play of a proper mil-pec AR.
Biggest thing is whatever lower you start with pretty much defines the group of all the other parts you have to stay in, and availablity can hang you up.The lack of proper mil-spec interchangeability turn you off on the large frame?
I keep thinking I want an AR10, but I think I'd be better served dropping the money in a Savage BA Stealth instead.
It's an Aero BCG.So what bolt do you have?
Buffer weight is probably fine. I'll probably tune on it anyway, but as it stands now, it does what it has to, I've just gotten used to my other builds making their own neat little brass piles for collection, and this one is a bit more spread out.I like Tactical Springs for most things.
Heavy Buffers are pretty popular with 308. My build was a real eye opener. It's fun though.
I had a JP enhanced bolt. I had extraction problems. Used BCM extractor spring kit... Better. Tactical Springs kit solved it.It's just a lot more involved than saying, I want this barrel, this brand, bcg, this upper, that lower, etc.
It's an Aero BCG.
Buffer weight is probably fine. I'll probably tune on it anyway, but as it stands now, it does what it has to, I've just gotten used to my other builds making their own neat little brass piles for collection, and this one is a bit more spread out.
I think you misunderstand, extraction is fine, the claw is just leaving a couple marks on the case where the edges are sharp.I had a JP enhanced bolt. I had extraction problems. Used BCM extractor spring kit... Better. Tactical Springs kit solved it.
Plus I talked with JP... They said they found AR15 parts were not sufficient for 308. They made an "enhanced" extractor with different claw profile. Basically weak springs and small extractor slip off cases. They sent me one for free. Zero problems after that.
Thanks!Nice thread, been following since February...
If you're buying new, you're in pretty good shape. There are two bolt and barrel extension types predominant [armalite and DPMS, which is a more prolific clone of the KAC SR25], and the main difference is in the bolt rotation for lockup.I just found a nice matching Aero Precision (DPMS) set, and looking for a barrel first. I noticed you noted the barrel nut threads were different per type, but are the barrels interchangeable? I haven't noticed any notes when looking at different manufacturers for DPMS/Armalite/PA308 etc?
Me too! I get more nervous trying to see how a new rifle is going to group than I do about making sure it's going to function correctly.Was happy to see yours shot well.
I do reload, which is why I made note of the extraction marks. Looking at the fired upper yesterday, there's some sharp corners with evidence of scratching possibly the bullet and definitely the case at the 9 and 3 o'clock locking lugs that need to be polished up too. Case scratches are for sure on extraction, but there was some copper in the brass shavings too, so might be some free accuracy in there as well.Regarding your extractor marks, I had the same issue with the extractor on my 458 Socom Bolt, they were sharp as claws, a little softening with a fine file stopped the scoring on the cases.
Then again as I reload the Socom brass and others that was important, if you're using NATO brass that you don't reload, the scoring really isn't an issue.
Sent from my SM-N950U using Tapatalk
There was pre-black Friday deals on each site... So...Yeah, I tout the ability to stretch purchases out as a virtue of building your own, but binge ordering is a thing too.