[quadfan]

I really like the 5.45x39 AK74 and think it would make an excellent AR round. I also have .223 AR's and lots of the parts interchange,like mags and stuff. I think the AR mags could be used as well as the bolt carrier and bolt(with just a little face work) so really all that would need to be changed is the upper w/barrel and change out the bolts,and away you go! They are about half the price of .223 ammo.

 

[Ridge Runner]

your reasoning makes no sense, this is not a flame just curious how 2 threads down you say the 7.62x39 case is too big for proper feeding in an AR but you want to build one on the same case necked to 22? you need another follower and different angle on the lips to get that case to feed. The dia. of the case isn't the culprit in feeding, My 458 SOCOM is fed by a standard AR mag, but the case dia. is so large they are single stacked, 40 rd. mag holds 15 rounds. with a good mag, anything that will go down the magwell will function in an AR. BTW the 458 Socom is based on a 50AE case stretched to 1.7" and the rim rebated to standard 30-06 size and necked to 45. Is the ballistic twin to a 450 Marlin in an AR action.
RR

 

[quadfan]

First of all, the 5.45x39 and 7.62x39 are not even close to being the same size! I took my conclusions from my experience with AK47's chambered in 5.45x39 and .223.I own one of each and have torn them down,looked them over ,measured,changed things around,and have come to the conclusion it would work..223 mags function inthe 5.45x39 AK and the 5.45x39 mags feed in the .223 AK. As far as I know,it's never been done,unlike the AR in 7.62x39,which has been around for a while. I've owned them and had lots of problems.Like I said, if you want to use 5rd mags,they work alright,but nobody I know buys an AR so they can have a little bity mag that holds no rounds and can't even be seen!It's very similar to the mini-30,I've had 2 of those and could'nt get any mags past 10rd to work consistantly.Maybe I'm being misunderstood,but in my opinion,if you constantly have to mess with somthing to keep it working,you have to decide if it's worth the hassle.And for me,the constant jamming,tweeking on the mag lips,etc was not worth it.
But I do belive the 5.45x39 is close enough to the .223 that such a conversion would be fairly painless.

 

[Flak 2]

You'll have to find a 21 cal. barrel blank. It might be cheaper to just buy a 5.45X39 (21 Genghis) top end from Alexander Arms. I think you would get about 18-20 rounds to feed out of a 30 round mag. Looks like about 14-16 out of a GI 20. You'll need at least a 1-8 twist barrel. I shoot my SAR2 quite a bit and find this round interesting.

 

[jjmitchell60]

I just posted a thread as to the same topic a few minutes ago. I bought a colt upper in 5.45 X 39 and my 20 round andd 30 round mags feed fine. I am picking up a 40 rounder tomorrow to see how it does. The 5.45 X 39 is .003 smaller in dia. at .221 where as 5,56 is .224 and the main diference is the case is shorter and necked back more than the 5.56. Mine shoots great but I was wondering if the price I gave was right. $300 complete with 3 boxes ammo?

 

[Not for hire]

I really like the 5.45x39 AK74 and think it would make an excellent AR round. I also have .223 AR's and lots of the parts interchange,like mags and stuff. I think the AR mags could be used as well as the bolt carrier and bolt(with just a little face work) so really all that would need to be changed is the upper w/barrel and change out the bolts,and away you go! They are about half the price of .223 ammo.

I owned a AR 15 pre ban COLT 7.62x39mm
I traded it for a Bushmaster in 5.56 as soon as i found out what a under performing
jam queen it was... the magazine was the problem... If you AR can use AK mags like the
Hydra from MGI then you have something... Every thing else SUCKS.
If you really want the last AR you'll ever need for multi cartridge quick change.
The hydra is your rifle.... 22LR 9mm 40S&W 45ACP 5.56 7.62x39mm and soon
7.62x51mm in AR15!!!!!!! The mag well is modular. Kick ass idea!!!!!!

 

[Not for hire]

What Makes Cents

your reasoning makes no sense, this is not a flame just curious how 2 threads down you say the 7.62x39 case is too big for proper feeding in an AR but you want to build one on the same case necked to 22? you need another follower and different angle on the lips to get that case to feed. The dia. of the case isn't the culprit in feeding, My 458 SOCOM is fed by a standard AR mag, but the case dia. is so large they are single stacked, 40 rd. mag holds 15 rounds. with a good mag, anything that will go down the magwell will function in an AR. BTW the 458 Socom is based on a 50AE case stretched to 1.7" and the rim rebated to standard 30-06 size and necked to 45. Is the ballistic twin to a 450 Marlin in an AR action.
RR

I like the 458 socom because it uses standard AR mags. I am trying to build a .257X45mm upper if TCU had made one it would be called the 25 TCU.
I checked the ballistics of one, Drives a heavier bullet at minimal loss of speed
and the AR is known for 357 power at 300 meters BUT 25x45 makes 300 lbs of energy more and sacks in at 44 magnum power at 300 meters. using varmit
bullets nothing is gonna laugh back at you... USES AR COMPONENETS NO SPECIAL ED REQUIRED. Thats what the Army should have had from DAY ONE!

 

[dolphan12]

If you AR can use AK mags like the
Hydra from MGI then you have something... Every thing else SUCKS.
If you really want the last AR you'll ever need for multi cartridge quick change.
The hydra is your rifle.... 22LR 9mm 40S&W 45ACP 5.56 7.62x39mm and soon
7.62x51mm in AR15!!!!!!! The mag well is modular. Kick ass idea!!!!!!

Yes, but how much loooonnnnggggggeeeeeeeerrrrrrrr will it be before MGI has anything but .223 and 7.62X39 on the street?

 

[HighDesertWolf]

I really like the 5.45x39 AK74 and think it would make an excellent AR round. I also have .223 AR's and lots of the parts interchange,like mags and stuff. I think the AR mags could be used as well as the bolt carrier and bolt(with just a little face work) so really all that would need to be changed is the upper w/barrel and change out the bolts,and away you go! They are about half the price of .223 ammo.

that half the price ammo is likely the bulgarian surplus floating around. No way in hell I would run that corrosive garbage through any gas operated rifle. I dont mind corrosive in a 60 dollar mosin nagant because its easy to clean and if the rifle gets fubar'ed its only 60 bucks im out. but corrosive ammo in a AR gas system would be very difficult to clean.

 

[markw76]

An AK really would be easier to clean than an AR, since the receiver gets a squirt of gas every round. Taking the bolt apart every time would be a pain too. I suppose you might get by squirting some windex through everything, but why take the chance?

 

[Not for hire]

I was told this summer the 7.62x51mm was coming. They have to make AR15
parts work with AR10 uppers. The bolt will be unique. If I remember right.

Sorry I was on vacation. Back from the outlands. I'll be around. Working on
my favorite toy to be... 25x45mm

 

[Not for hire]

This has been addressed... Bushmaster offers the gas piston for the AR.
And I want one! others offer this too. It's expensive but in time I think
this will replace the gas tube. I have played with all of them. And I like them all.
But mixing them around ( parts ) is not all good. But heck why not try it any way.