I'm really contemplating a SHF 50bmg upper I have one box of 50bmg but nothing to shoot it with

 

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I really want to do the 5.45 upper but the mag issue is keeping me away. Somebody told me you can download regular ar mags with 5.45 ammo and they will work. Any confirmation on that?

True, 5.45 are 7.62x39 cases necked down to 5.45.  The taper of the case presents the problem, same as the AK mags.  That is why they have the "bend" in them, to improve feeding. 

The caliber you go with really depends on what the gun is for.  HD?, Hunting?  Plinking?   My personal opinion is that 6.8SPC will become an important caliber in the not too distant future.  I intend to build my next AR in 6.8.

Well I don't hunt I want to but would need someone to go with once I get course done and you can't hung in jersey with an ar so more fore plinking

 

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5.45...CHEAP ammo.....I may build one next

What about mags for 5.45 the 300 blackout seems like a good option because I can use mags I already have which are p mags

 

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Mags have been discussed earlier in the thread

Ok since my birthday is January 11 I get a discount at midway as long as order is in before midnight cst on my b day I'm looking to spend under 1000 on the upper all the ones I see have either flash hider or mag over 30 rounds how do I go about getting one and any recommendations of one on there

 

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http://www.fleetfarm.com/detail/huldra-mark-iv-5-45-x-39-complete-upper/0000000069737

Looks like a good price

I was referring to on midway usa only

 

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so 5.45x29 will fit in my pmags i have some 15/30 and some 15/20.  and if so how many rounds should fit i saw mags for 5.45x39 for the ar but they are 30 rounds 

I really want to do a 5.7 upper but ammo is not cheap or easy to find

 

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I hsd originally wanted a 5.7 upper but the thought of another caliber and the price of that ammo has made me forget that idea

True I don't want another 5.56 unless a short as in pistol length but not legal here I shoot 22lr, 38spcl 357mag, 9mm, 45acp, 7.62x54r 5.56, 12 guage , and now 30-06 which I have not shot yet but do have the gun. A caliber in something I shoot would be nice not sure what though

 

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300 blackout or if price of ammo is no issue beowulf would be badass.

Will have to look at the beowulf

 

I have 1 10 round box of 50bmg I need to do something with but to get a 50bmg upper for only 10 rounds is not smart

 

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Upper not to bad in price ammo is an ouch in 50 beowulf and not easy to find looks like 300 blackout hmm build my own or buy a complete upper

 

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I built one chambered in 7.62x39 and ive seen them for sale around. Bottom line when putting that caliber in an AR is finding a mag that feeds reliably. other than that its wicked fun to shoot and cheaper than most calibers.

 

I am currently building one chambered in 9mm

I know I brought it up before, but anybody serious about doing odd (such as commie) calibers in the AR should consider the MGI products.

 

You can get a complete rifle in most configurations for about $1300. And they will use real mags - AKM mags, AK-74 mags, greasegun mags, etc. Not modified, expensive, unreliable mags. So, when you consider the savings in mag costs, it probably brings the rifle cost down about $100-$200. Plus, you can swap out magwells for around $275 to use other non-AR mags and calibers.

 

https://www.mgi-military.com/store/index.php?category=10

 

It's pricey but you get to use the real gear which is reliable and cheap.

I can't do the mgi with this as I'm using a nj gf lower

 

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