Re: Seekins 308 AR platform
Someone can correct me if I am wrong, but I think the problem with AR10 uppers and SR25 type mags is the upper and not just the lower. The upper needs to be modified to accept the mags.
By all accounts the AR10 uppers fit on SR25-style (i.e. vintage AR10/KAC/LMT/LaRue) lowers with a little work reaming out take down pin holes, but to accept the SR25 mags you need to do some more in depth modification. A guy who did it talks about it in this thread:
http://www.ak47.net/forums/topic.html?b=3&f=62&t=521503 <div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">I can't remember who,but one of the guys at Ranier said he test fitted an Armalite upper on a Mega lower and it fit.That being said,it's not as simple as that.You still have to modify the Armalite upper receiver to accept the SR25 style mags.And you may have to ream the takedown pin holes a little.I bought a 308 Larue OBR lower and have modded two Armalite uppers to fit it.</div></div>
Here is another guy who appears to have done it:
http://www.ar15.com/forums/topic.html?b=3&f=62&t=378850&page=2 <div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Armalite AR10 uppers can be adapted to the SR25 lower. You have to enlarge the front upper hole to accomadate the bigger push pin on the front of the 25. You also have to make a depression in the left side upper for the bolt release and last remove the lower cartridge guides (2) on the insided of the AR10 upper so the magazine can be fully inserted. I did this to a AR10 carbine upper as KAC gave me a flat NO! to the question during my SR25M build.</div></div>
Here is the quote from Ranier regarding the MA-Ten that the guy above was talking aboute:
http://www.ar15.com/forums/topic.html?b=3&f=124&t=509882&page=1 <div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Mega has tested their lower with an Armalite upper and it did function. The tests have been very minimal so MEGA can not endorse anything with the lack of test thus far. However, the Armalite BCG has a narrower cut than the DMPS so the hammer has to be smaller than the standard DPMS trigger. Also, the take down pins & pivot pin for the Armalite upper is also smaller by a few thousands so you would need to use Armalite pins. I would assume if an Armalite LPK is used, the Armalite upper could be used with this lower. </div></div>
MEGA states that their MA-Ten set is proprietary fit. I emailed them about it some time ago:
<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">The pattern we used for the MA-TEN set is proprietary to Mega-Arms. The lines match perfectly to our upper and lower only. We did this for the reason of nobody else's are the same. The is a distinct difference between Armalite and DPMS lowers. Both will function, just not match. Go to our website and look at the close up pictures of the set. You will see the differences in am talking about. We are waiting to see samples from our forgers. They said they have samples for AR-10 forgings. So check back with me periodically.
Thanks,
Jason Curns
Mega-Arms
Firearms Sales Manager
1-360-357-5372 Office
[email protected] [email protected] www.megaarms.com www.megamachineshop.com -----Original Message-----
From:
Sent: Tuesday, January 11, 2011 8:58 PM
To:
[email protected] Subject: question re MA Ten compatability
Hello, I have some question about your MA Ten matched set.
I understand that they come in a matched set, but I wanted to know if
upper to lower fit was SR25 pattern (or original Armalite AR10/LMT
MWS/Larue OBR) or something else. Basically I would like to be able to
swap uppers and lowers between a MA Ten build and a MWS. Wanted to make
sure that they would fit/would be compatible.
Also I wanted to know if there were any plans in the future to offer
forged uppers/lowers in the MA Ten pattern.
Thanks!
Dom
</div></div>
Seekins looks to be making the same statement with their set. As he said above, for liability reasons they don't want to be responsible for what people attach to their uppers and lowers. Thus call it proprietary and make no guarantees about compatability.
LPK issues aside, if the Seekins uppers and lowers function with SR25 style uppers and lowers, as the MA-Ten is <span style="font-weight: bold"><span style="text-decoration: underline">rumored</span></span> to do, I think alot of people will be very happy.