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MadRich
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Posted: 12/28/2007 11:28:27 AM

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Does anyone have a x39 upper with 14.5" or 18" barrels? What are the pros and cons of these configurations?
The_Beer_Slayer
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Posted: 12/28/2007 11:39:47 AM
the dpms will not shoot wolf or silver bear ammo. the firing pin will not set it off.

per dpms they only use remmington ammo for testing and it that works it's fine

might keep that in mind.
TBS is an island of Sanity in a sea of bullshit.
jkstexas2001

Originally Posted By Cypher214:
If bigfoot makes it through 90 rounds of .223, 45 rounds of 9mm, and one sharp KaBar... he deserves my anal virginity.
twl
MGI Military:The Future of Small Arms Development
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Posted: 12/28/2007 11:45:25 AM
[Last Edit: 12/28/2007 11:47:26 AM by twl]
MGI makes a drop-in kit which includes a modified bolt with a longer/thicker firing pin, that will restore the function of the 7.62x39 uppers with the Eastern European ammo.
It strikes deeper and fuller than the normal firing pin, and it requires purchasing the bolt with it, because the hole in the bolt for the firing pin is enlarged to suit the larger pin.

We originally designed this to help ignition reliability with all 7.62x39 ammo with our MGI Hydra platform, but it will do just as well in anybody's 7.62x39 AR15 that needs some help in better strike with that ammo.

I run an ad on the EE for this, or you could just call me if you're interested.
MGI Sales Representative for AR15.com, and the internet
Call 423-746-9019
or email twlyons@juno.com
CALL ME TO ORDER YOUR MGI PRODUCTS !!!!!!!!!!!!!!!!!!!!!
The_Beer_Slayer
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Posted: 12/28/2007 11:51:50 AM
and they work well.

it's just damned sad you have to another 200 or so on a NEW upper to make it work.
TBS is an island of Sanity in a sea of bullshit.
jkstexas2001

Originally Posted By Cypher214:
If bigfoot makes it through 90 rounds of .223, 45 rounds of 9mm, and one sharp KaBar... he deserves my anal virginity.
twl
MGI Military:The Future of Small Arms Development
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Posted: 12/28/2007 11:59:51 AM

Originally Posted By The_Beer_Slayer:
and they work well.

it's just damned sad you have to another 200 or so on a NEW upper to make it work.


$125 plus S&H for the bolt and improved pin for 7,62x39.

Yeah, it is a shame to have to change things right away, but some guns will work ok with the stock stuff, and some won't. FP protrusion needs to be around .039" for the Wolf and other Eastern ammo, and most AR pins only protrude about .031".
When you attempt to mod things to get longer protrusion, sometimes the pin starts to pierce primers because the tip is so narrow. The only reason why the new bolt is needed is because the pin is a little thicker and won't fit thru the hole in a normal bolt.

With our kit, we make the pin longer and thicker, which solves the ignition issues and the piercing issuses too.

We wondered why nobody thought of this before, but at least we have made a solution available. We sell these often with our MGI Hydra variant with the AK magwell and 7.62x39 conversions.
MGI Sales Representative for AR15.com, and the internet
Call 423-746-9019
or email twlyons@juno.com
CALL ME TO ORDER YOUR MGI PRODUCTS !!!!!!!!!!!!!!!!!!!!!
The_Beer_Slayer
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Posted: 12/28/2007 12:06:52 PM
[Last Edit: 12/29/2007 10:19:14 AM by The_Beer_Slayer]
yep, i have freinds that own 2 of your kits so far and they work VERY well.

edited.

i was on the phone when i typed this. i don't personally own the kits i my freinds do and they run perfectly.
TBS is an island of Sanity in a sea of bullshit.
jkstexas2001

Originally Posted By Cypher214:
If bigfoot makes it through 90 rounds of .223, 45 rounds of 9mm, and one sharp KaBar... he deserves my anal virginity.
StrongCo
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Posted: 12/28/2007 4:00:25 PM

Originally Posted By The_Beer_Slayer:
yep, i have 2 of your kits so far and they work VERY well.


Hello - New to AR15.com (1st post) and new to AR type rifles but have been researching and admiring for some time...Will take possession of a new DPMS .308 AP4 w/ ACOG scope later next week (so long as UPS does not drop the ball...)

I'm looking to be able to shoot both .308 and the 7.62 rounds w/ my AP4 as stated above it appears due to bolt length/strike some mods are needed for "some 7.62 rounds" is this mod require for all 7.62 rounds? Are there 7.62 rounds that I can use "now"?

Thanks in advance for the support. Also is there a forum topic I need to introduce myself on? Still learning to navigate AR15.com

nmmi9100
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Posted: 12/28/2007 4:39:29 PM
[Last Edit: 12/28/2007 4:41:56 PM by nmmi9100]
StrongCo:

These gentlemen are talking about 7.62 x 39mm which is the SKS/AK round and NOT the 7.62x51mm aka 7.62 NATO you are talking about. Your rifle shouldn't have any problem firing 7.62 NATO. It will NOT, however, fire 7.62 x 39mm. Totally different chamber.

By the way, Welcome Aboard at AR15.com! Good to have you!

-David
Edgewood, NM
StrongCo
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Posted: 12/28/2007 5:03:43 PM
Dave, Thanks...As I re-read the thread I noticed that as well but you answered my question accurately and I appreciate that. Have a great Holdiay! I'll let you guys know how the rifle shoots next weekend.
mylt1
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Posted: 12/28/2007 5:12:24 PM

Originally Posted By MadRich:
Does anyone have a x39 upper with 14.5" or 18" barrels? What are the pros and cons of these configurations?
i was gonna offer to sell you my 7.62 upper but i see your not in a free state so im not sure you could have it. i have a 20" free float that shoots just fine. DPMS lower with a model 1 sales parts kit and upper.
MadRich
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Posted: 12/28/2007 8:02:19 PM
[Last Edit: 12/28/2007 8:06:26 PM by MadRich]

Originally Posted By mylt1:

Originally Posted By MadRich:
Does anyone have a x39 upper with 14.5" or 18" barrels? What are the pros and cons of these configurations?
i was gonna offer to sell you my 7.62 upper but i see your not in a free state so im not sure you could have it. i have a 20" free float that shoots just fine. DPMS lower with a model 1 sales parts kit and upper.

I'm still able to obtain uppers for my lower receiver, there is no regulation against non-ffl items.
Let me know what you have to offer, I'm interested.

Also, thanks for the other replies. I do know about the FP problems, what I want to know is if anybody is using 14.5" and 18" barrels and what feedback they have.
mylt1
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Posted: 12/29/2007 1:09:51 AM
i'll post up a pic and try to figure out what shipping is. if your interested i'll toss in a couple of 10rd mags for it. they are the 10rders from brownells. they seem to work fine but have some problems. but i think there from the upper not being broke in. i dont have time to shoot it any more. 2 kids and a GF that works a rotating shift means not many weekends to shoot. i would guess its had 200 maybe 300 rds through it.
The_Beer_Slayer
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Posted: 12/29/2007 10:20:33 AM

Originally Posted By mylt1:
i'll post up a pic and try to figure out what shipping is. if your interested i'll toss in a couple of 10rd mags for it. they are the 10rders from brownells. they seem to work fine but have some problems. but i think there from the upper not being broke in. i dont have time to shoot it any more. 2 kids and a GF that works a rotating shift means not many weekends to shoot. i would guess its had 200 maybe 300 rds through it.


you will need to do this via email.

NO FOR SALE ADS OUTSIDE OF THE EE.
TBS is an island of Sanity in a sea of bullshit.
jkstexas2001

Originally Posted By Cypher214:
If bigfoot makes it through 90 rounds of .223, 45 rounds of 9mm, and one sharp KaBar... he deserves my anal virginity.
M-Dub
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Posted: 12/31/2007 9:07:20 AM
Can 7.62x39 uppers be swapped onto a standard AR-15 lower (like 6.8SPC)? Or do you have to get a 7.62-specific lower?
The_Beer_Slayer
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Posted: 12/31/2007 9:11:24 AM

Originally Posted By M-Dub:
Can 7.62x39 uppers be swapped onto a standard AR-15 lower (like 6.8SPC)? Or do you have to get a 7.62-specific lower?


regular lower
TBS is an island of Sanity in a sea of bullshit.
jkstexas2001

Originally Posted By Cypher214:
If bigfoot makes it through 90 rounds of .223, 45 rounds of 9mm, and one sharp KaBar... he deserves my anal virginity.
The_Beer_Slayer
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Posted: 12/31/2007 9:11:26 AM

Originally Posted By M-Dub:
Can 7.62x39 uppers be swapped onto a standard AR-15 lower (like 6.8SPC)? Or do you have to get a 7.62-specific lower?


regular lower
TBS is an island of Sanity in a sea of bullshit.
jkstexas2001

Originally Posted By Cypher214:
If bigfoot makes it through 90 rounds of .223, 45 rounds of 9mm, and one sharp KaBar... he deserves my anal virginity.
M40_Sniper
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Posted: 1/1/2008 5:56:01 PM
Question for you guys with 7.62x39 uppers. Does it make the normal AK sound when firing. Love that sound. Not as cool as a minigun firing but cool any way.
amphibian
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Posted: 1/1/2008 8:58:09 PM

Originally Posted By M40_Sniper:
Question for you guys with 7.62x39 uppers. Does it make the normal AK sound when firing. Love that sound. Not as cool as a minigun firing but cool any way.


No, doesn't sound like an AK.
Here is a video of one of my setups.
www.livevideo.com/video/24DB488D4B50482784F77C64CC254FAA/7-5-7-62x39-upper-w-mgi-modu.aspx
M40_Sniper
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Posted: 1/2/2008 12:26:52 AM
Sweet video. Really makes me want a full auto. When prices start at 10K and go up, just wont be a grass field I will be able to stand in.
M40_Sniper
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Posted: 1/2/2008 12:28:29 AM
Sweet video. Really makes me want a full auto. When prices start at 10K and go up, just wont be a grass field I will be able to stand in.
M60forever
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Posted: 1/12/2008 3:16:38 PM

Originally Posted By The_Beer_Slayer:
the dpms will not shoot wolf or silver bear ammo. the firing pin will not set it off.

per dpms they only use remmington ammo for testing and it that works it's fine

might keep that in mind.


THAT SUCKS!!!!!!!!!!!!$$$$$$$
SnakeLogan
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Posted: 1/12/2008 3:19:52 PM
Olympic Arms makes a 7.62x39 rifle. Not sure if you can buy the upper seperately though.
Colt45guy
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Posted: 1/12/2008 5:07:00 PM
[Last Edit: 1/12/2008 5:09:16 PM by Colt45guy]

Originally Posted By M60forever:

Originally Posted By The_Beer_Slayer:
the dpms will not shoot wolf or silver bear ammo. the firing pin will not set it off.

per dpms they only use remmington ammo for testing and it that works it's fine

might keep that in mind.


THAT SUCKS!!!!!!!!!!!!$$$$$$$



filing a few thousandths of an inch off the tail of the bolt takes care of those light strikes. Easy trick. MGI makes a factory Wolf Friendly bolt assy too....I think there's other changes made, but holding the MGI and DPMS side by side, I'm hard pressed to see what those changes are.



ETA: My wife has only had her 7.62x39 AR for a few months, and it's been fed a steady diet of nothing but Wolf. The DPMS bolt assy had light strikes 2 or 3 times/100....not a single misfire since filing the tail, and it's pushing the 1000 rd mark. She's keeping the MGI bolt assy in her pistol grip as a spare.
twl
MGI Military:The Future of Small Arms Development
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Posted: 1/12/2008 6:00:55 PM

Originally Posted By Colt45guy:

Originally Posted By M60forever:

Originally Posted By The_Beer_Slayer:
the dpms will not shoot wolf or silver bear ammo. the firing pin will not set it off.

per dpms they only use remmington ammo for testing and it that works it's fine

might keep that in mind.


THAT SUCKS!!!!!!!!!!!!$$$$$$$



filing a few thousandths of an inch off the tail of the bolt takes care of those light strikes. Easy trick. MGI makes a factory Wolf Friendly bolt assy too....I think there's other changes made, but holding the MGI and DPMS side by side, I'm hard pressed to see what those changes are.



ETA: My wife has only had her 7.62x39 AR for a few months, and it's been fed a steady diet of nothing but Wolf. The DPMS bolt assy had light strikes 2 or 3 times/100....not a single misfire since filing the tail, and it's pushing the 1000 rd mark. She's keeping the MGI bolt assy in her pistol grip as a spare.


The MGI kit's main difference is the firing pin is a little larger diameter and a little longer, with a reprofiled tip.
The bolt's change is primarily that the firing pin-hole is reamed out larger to accept the new improved pin. But this bolt is needed with the kit because the new pin won't fit into the hole in a normal bolt.
The purpose is to strike deeper and broader, so that the deeper strike doesn't pierce the primer like the narrower normal AR15 pin can.
That's all it is.
MGI Sales Representative for AR15.com, and the internet
Call 423-746-9019
or email twlyons@juno.com
CALL ME TO ORDER YOUR MGI PRODUCTS !!!!!!!!!!!!!!!!!!!!!
ZY
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Posted: 1/16/2008 10:59:28 PM
FWIW, my 7.69 upper was working fine with Win and reloads, but would misfire 3-4 out of 5 rounds when using Wolf. A few hits of the diamond file on the end of the bolt put my firing pin at about .034" protrusion and now she really runs like a champ.

Of course the battery on my Aimpoint decided to go Tango-Uniform that day I got the bolt fixed up, but of the very few aimed groups I have shot, twice it put three shots into a single hole at 50 yards. I am hoping it's a shooter....

ZY
BravoSector1
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Posted: 1/17/2008 8:23:04 PM
[Last Edit: 1/17/2008 8:23:39 PM by BravoSector1]
No issues thus far with my Model1sales upper in 7.62x39. Eats the "Wolf" too.
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