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#5968340 - 10/08/15 07:28 PM Is there a thread on 7mm-08 AR
BassCat'99 Offline
Tracker

Registered: 02/15/13
Posts: 921
Loc: Stratford Texas
Tried the search but I'm not too spiffy with it. Anything with info on the upper is what I'm looking for. I have a ar10/lr308 lower that wants to march to a different drum.
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#5968908 - 10/09/15 06:53 AM Re: Is there a thread on 7mm-08 AR [Re: BassCat'99]
GLC Offline


Registered: 02/25/09
Posts: 4109
Loc: Burleson Texas
From what I can remember, if you are talking about a DPMS model, your lower will only accept a DPMS upper so you will be looking for availability of DPMS parts.
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#5969049 - 10/09/15 08:38 AM Re: Is there a thread on 7mm-08 AR [Re: BassCat'99]
BassCat'99 Offline
Tracker

Registered: 02/15/13
Posts: 921
Loc: Stratford Texas
I have a PSA lower, believe is says PT10, P-TAC. Mainly wondering about bolt, mags and thoughts on who's barrel.
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#5969668 - 10/09/15 03:38 PM Re: Is there a thread on 7mm-08 AR [Re: BassCat'99]
tenyearsgone Offline
Pro Tracker

Registered: 04/21/13
Posts: 1213
PSA makes a 7-08 upper. Problem solved.

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#5969681 - 10/09/15 03:48 PM Re: Is there a thread on 7mm-08 AR [Re: BassCat'99]
KRoyal Offline
THF Celebrity

Registered: 01/24/07
Posts: 13622
Loc: Sherman/North of Dallas
If you have a PA10 lower you need to stay with PSA stuff. For some odd reason they made a lot of their parts proprietary.

This is a direct quote from PSA from ARFCOM

Quote:
Front and rear take down pins (longer)
The bolt catch (larger)
The Mag catch
The carbine buffer tube (longer)
Carbine and rifle buffers (shorter)
The PA10 stripped upper receiver is low profile, but the PA10 configuration is mostly proprietary. We can only guarantee that PA10 parts will be compatible with other PA10 parts.


Also the uppers and lowers are not AR10/LR308 compatible a PSA PA10 upper will not fit on a DPMS/Armalite lower vise versa with PA10 lowers and DPMS/Armalite uppers.
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#5970019 - 10/09/15 08:18 PM Re: Is there a thread on 7mm-08 AR [Re: BassCat'99]
BassCat'99 Offline
Tracker

Registered: 02/15/13
Posts: 921
Loc: Stratford Texas
I had looked at PSA but their only 7mm-08 has a 20" barrel. I was thinking 16" maybe 18". I don't mind using a PSA upper, I think they are fine. Any problem with the lengths I'm thinking of?
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#5970034 - 10/09/15 08:33 PM Re: Is there a thread on 7mm-08 AR [Re: BassCat'99]
BassCat'99 Offline
Tracker

Registered: 02/15/13
Posts: 921
Loc: Stratford Texas
on my list next is the bolt, I'm lead to belive the .308 carrier will work but what about the bolt itself?
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#5970067 - 10/09/15 09:01 PM Re: Is there a thread on 7mm-08 AR [Re: BassCat'99]
Anton Chigurh Online   content
Bird Dog

Registered: 06/22/14
Posts: 288
Loc: Stephenville
The bolt will be same as a .308 (7mm-08 is a necked down .308, right?).

Some AR barrels come with "headspaced" bolts, which means the barrel maker supposedly checked that the bolt was in spec.

Some drop in AR barrels do not come with bolts, but should headspace fine with a proper in spec bolt.

Does the PSA upper not come complete with BCG? If the PSA stuff is proprietary I'd think they'd have one available with the upper.


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#5970162 - 10/09/15 10:48 PM Re: Is there a thread on 7mm-08 AR [Re: BassCat'99]
seacam Offline
Pro Tracker

Registered: 10/18/09
Posts: 1123
Loc: Hutto, TX
DPMS patten upper will fit on a PSA PA-10 lower. I put one together in 308 using the DPMS upper.

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#5970194 - 10/09/15 11:18 PM Re: Is there a thread on 7mm-08 AR [Re: seacam]
KRoyal Offline
THF Celebrity

Registered: 01/24/07
Posts: 13622
Loc: Sherman/North of Dallas
Originally Posted By: seacam
DPMS patten upper will fit on a PSA PA-10 lower. I put one together in 308 using the DPMS upper.


Then they have changed them, that was a quote from the psa rep on arfcom in reply to a customer complaining that it didn't fit.
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#5970290 - 10/10/15 06:34 AM Re: Is there a thread on 7mm-08 AR [Re: BassCat'99]
BassCat'99 Offline
Tracker

Registered: 02/15/13
Posts: 921
Loc: Stratford Texas
So the next big decision is barrel, length and mfg. If you have one, what length is it and is there any reason not to go with a shorter barrel?
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#5970508 - 10/10/15 09:56 AM Re: Is there a thread on 7mm-08 AR [Re: BassCat'99]
QuitShootinYoungBucks Offline
THF Trophy Hunter

Registered: 11/01/12
Posts: 6446
Loc: Lubbock, TX
Originally Posted By: BassCat'99
So the next big decision is barrel, length and mfg. If you have one, what length is it and is there any reason not to go with a shorter barrel?


I don't know about manufacturers, but if you aren't running a suppressor/brake/hider I'd go at least 18".
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