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Putting together an Upper, primarily for bench fun. With accuracy in mind what receiver should I get. I'm down to the following choices:
https://www.primaryarms.com/Upper_Receiv...ft55m4.htm
https://www.primaryarms.com/Vltor_MUR_Up...mur-1s.htm
Or, is there something else on the market I'm not aware of. Looking for the heavier, thick walled forged receiver with no forward assist. I would like a billet receivers but they are just a bit out of my price range.
Componets I already have for this build:
18" Rock Creek Barrel
JP Recoil Eliminator
12" MI Gen 2 Handguard
BCM BCG
Also, what would be the best Adjustable Gas Block that will fit under the MI Handguard?
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04-24-2015, 03:52 PM
(This post was last modified: 04-24-2015, 04:00 PM by AZ. Old Guy.)
I really like my Sun Devil Upper/Lower. A lot stronger. Can do smooth side lots of finishes and they offer an adjustably gas key also. sundevilmfg.com
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AZ. Old Guy Wrote:I really like my Sun Devil Upper/Lower. A lot stronger. Can do smooth side lots of finishes and they offer an adjustably gas key also. sundevilmfg.com
I'll check'em out, thanks.
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I really like these. Putting together another with this upper. But, you may want a shell deflector? If not, these are very thick walled and hard to beat....
http://www.midwayusa.com/product/138383/...-top-matte
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There was a special over at arfcom on wilson upper/lower sets.
I'm partial to the SLR gas blocks myself.
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keystone183 Wrote:I really like these. Putting together another with this upper. But, you may want a shell deflector? If not, these are very thick walled and hard to beat....
http://www.midwayusa.com/product/138383/...-top-matte
I'm a lefty, so I wouldn't want a receiver w/o the bump-out. I was just doing some reading on the M-16 history and it was stated that they added the bump-out, so lefties don't get hit with hot brass.
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OK looking at billets, some are 6061 some are 7075 alum. I would only buy a forged rec. made of 7075-T6. For a billet will the 6061 material give the same strength as a 7075 forged rec.?
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Well, i don't have any first hand experience with these....but they appear mostly the same as the other ones.....also, i believe they're discontinued, so you may want to snap up a couple.....
http://www.jsesurplus.com/dpmssouthpawupper.aspx
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04-24-2015, 08:28 PM
(This post was last modified: 04-24-2015, 08:39 PM by am4966.)
You can get the Vltor MUR without the forward assist for a lot less than what primary arms has it for...Tier one arms
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04-24-2015, 08:33 PM
(This post was last modified: 04-24-2015, 09:47 PM by bwaites.)
65Whelen Wrote:OK looking at billets, some are 6061 some are 7075 alum. I would only buy a forged rec. made of 7075-T6. For a billet will the 6061 material give the same strength as a 7075 forged rec.?
No, but does it matter? The lower really doesn't have any stresses on it, which is why some people can use polymer lowers. 6061 is more corrosion resistent, as well. BUT, if you want the ultimate in strength for an AR aluminum lower, then you want 7075, which has almost twice the tensile strength. (70,000 PSI vs 43,000)
And because the UPPER does have stresses, you want 7075.
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I'm a big fan of Mega Machine and Tool. Check this one out. http://www.rainierarms.com/upper-mega-fo...ipped-6858
Although this looks interesting. http://www.rainierarms.com/san-tan-tacti...r-receiver
Rainier Arms gives a discount to law enforcement, and military. http://www.rainierarms.com/leo-mil-discounts/
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I just put together my 6.5 and used the Vltor MUR and like it. If I was to go for billet I would go with Mega. Will send you a link for a great price on the MUR.
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Ok sorry I wont they are out of stock right now.... Price was 145 shipped when I grabbed mine. Look around there are deals out there.
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Why not just grab one of the PF uppers from Mark?
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04-25-2015, 01:22 PM
(This post was last modified: 04-25-2015, 01:28 PM by 65Whelen.)
spectra Wrote:I just put together my 6.5 and used the Vltor MUR and like it. If I was to go for billet I would go with Mega. Will send you a link for a great price on the MUR.
Spectra,
I just checked out your build, very nice. That Vltor MUR looks like the ticket.
Also, the Aero Scope Mt. you used, I put one on my Carbine. Nice Mt. very lightweight, 4oz lighter than the Larue I was using.
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am4966 Wrote:You can get the Vltor MUR without the forward assist for a lot less than what primary arms has it for...Tier one arms
I checked out Tier One, yup $40 cheeper, but they're out of stock. Will keep an eye out, thanks.
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din Wrote:Why not just grab one of the PF uppers from Mark?
PF was the first place I looked, I bought one of the group buy Grendel Lower from him but he doesn't have a forged upper w/o the forward assist. I'm getting picky in my old age.
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Aero Precision has their 7075 upper w/o forward assist in stock.
http://aeroprecisionusa.com/aspx/store/p...spx?pid=51
Paul Peloquin
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keystone183 Wrote:I really like these. Putting together another with this upper. But, you may want a shell deflector? If not, these are very thick walled and hard to beat....
http://www.midwayusa.com/product/138383/...-top-matte
I used the DPMS on my Grendel and it does fine. Here is another extruded option.
https://nordiccomp.com/product/nordic-co...-stripped/
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