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5.45mm Upper


This is a discussion on 5.45mm Upper within the AR-15 forums, part of the Long Guns category!
I been wanting a 5.45mm upper for a while to circumvent the ammo prices. I had wnated one badly enough ...


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Old 04-25-2013, 05:41 PM   #1 (permalink)
 
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Default 5.45mm Upper

I been wanting a 5.45mm upper for a while to circumvent the ammo prices.
I had wnated one badly enough I ha dalready bought 2 cases (1080 each)

So I finally picked one up used (at a new price, sigh)
The guy threw in 2 Mags and had the original box.

Unit was in decent shape.

As whole i tdoesnt have the quality feel that say a SR556C upper or a Sig516 upper would have but I didnt expect that.
Am just happy to have gotten a melonited piston upper for 5.45

I wanted specifically piston since the surplus ammo is so dirty.


The Adams arms BCG looked real nice obviously had a feature to reduce/eliminate carrier tilt (check the pics).
Something else I thought was interesting was that the Bolt was spring loaded.
As the pics show the pisoitn assembly comes out real easy, easier than on any other piston guns I own.

I will have to add a rail to it and get rid of the handguards.
This is because I want to use this as a cheaper trainer.
I put on a set of Magpul flip ups I had lying around and yes I am well aware that the plastic on the front one may melt.

But i needed <something> on there for now.
I may yet get some metal sights for it.

And now for the gun porn:
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Last edited by Bluez; 04-25-2013 at 06:51 PM.
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Old 04-25-2013, 05:43 PM   #2 (permalink)
 
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.................................

I mounted the upper on a spare lower I had.
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Old 04-25-2013, 06:36 PM   #3 (permalink)
 
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Very nice. I'd love to have a 5.45 upper one day
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Old 04-26-2013, 09:28 AM   #4 (permalink)
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So what was the price?
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Old 04-26-2013, 04:45 PM   #5 (permalink)
 
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$830 just for the upper w/ supposedly only 500 rds thru it .
A new 5.45 DI upper from midway is 650 BUT everyone always seems to be out of stock.
The MSRP for this Piston Upper form AA is $827

And the AA unit has the barrel and the BCG and bolt all melonited (nitrided)

I heard you have to put a stronger hammer spring on it since the soviet surplus ammo like a harder strike on its primers.

is that always necessary?
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Old 04-26-2013, 09:52 PM   #6 (permalink)
 
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Not sure about the hammer spring on the 5.45 stuff but it helps for sure on the 7.62x39 ar. I also just upgraded my firing pin to the model 1 sales 7.62x39 one but probably won't get a chance to hit the range anytime soon. Try brownells.com for the wolf power spring. I need to order another one sometime soon
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Old 04-27-2013, 12:21 PM   #7 (permalink)
 
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Today I took the ancient (production year 2000) EOtech off my 50 Beowulf (it came with it) and put it on the 5.45mm.

reasoning is that the 5.45mm is going to be a training gun and probably see some volume of fires where the Beowulf will only fire very few rounds.

Also the MagPul Mbus plastic melting up front risk is much less with the Beowulf since for the same reason.

On top of that less accuracy is needed with the Beowulf since my mission profile for it might be large things at under 100yds so the Irons will serve me just fine.
..............
Also I found out that ,as I suspected, the barrel AA 5.45mm is 4150 CMBV not 4140.
This makes me feel a better about my buy, as the Smith&Wesson 5.45mm upper with 4140 barrels seem to have reports about premature barrell wear, hopefull the harder steel here will not suffer the same fate.

Also everything is melonited including the BCG and Bolt which is also very nice and a good fit for soviet surplus ammo


I am waiting for a couple of minor parts for I can do some alternate configurations and then post updated pics of both rifles
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Last edited by Bluez; 04-27-2013 at 10:37 PM.
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Old 04-27-2013, 12:37 PM   #8 (permalink)
 
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The model site says to only use their 5.45x39 firing pin with their bolt. The wolf spring may be a cheaper solution if you're having issues with light primer strikes. Heres a link to the firing pin

https://www.model1sales.com/index.cf...ategory_id=421
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Old 04-27-2013, 12:52 PM   #9 (permalink)
 
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The firing pin thats in there came w/ the AA Upper.
I dont have light strike issues yet as I havent fired it yet.
My indoor range wont allow this ammo and in any event I just had eye surgery a couple weeks ago and am not allowed to shoot for another 2.

I hope by then I can get on a buddys buddy property for shooting
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Old 04-27-2013, 12:56 PM   #10 (permalink)
 
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Interested to see how well it works. I've read good things about the adams arms uppers so you'll probably be fine. I'll be watching this thread for updates
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