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Posted: 11/4/2010 8:28:13 AM EDT
Anyone have a source for 300 Win Mag uppers ?? or at least a bolt and barrel extension?????
Thanks |
| Wouldn't be able to feed from a mag unless you do something radically different, and given the investment required to make this happen it really makes more sense to me to just purchase a bolt gun chambered in .300wm. You do realize, that a 5.56mm nato cartridge is 2.25" long and a .300WM is 3.340" long right? |
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Quoted:
Wouldn't be able to feed from a mag unless you do something radically different, and given the investment required to make this happen it really makes more sense to me to just purchase a bolt gun chambered in .300wm. You do realize, that a 5.56mm nato cartridge is 2.25" long and a .300WM is 3.340" long right? Two things, though that keep me wanting a bolt-action upper... 1. You can get around the mag-well issue by having a side-feed mag, like the Safety Harbor or Zel Custom .50 BMG upper. If it could feed from conventional .308 rifle mags (FAL, Pmag, G3, M-14, etc.) or BAR (M-1918) mags, depending on cartridge length, so much the better. 2. I like the ergos and modularity of the AR. If you've got a nice trigger setup in your existing lower, and the stock can take it, putting a standard or magnum cartridge through an upper would add to the flexibility of the weapon. Those are my reasons for wanting a bolt-action AR upper. The mag well could become an accessory port, with a mag-block that could serve as a palm rest, or attachment for a bipod. Best, JBR |
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These guys make a .338 Lapua Mag AR style rifle and the site says that .300 Win Mag is "coming soon"
.338 LM AR It isn't exactly cheap and I've no idea how reliable it is. But it has been done. |
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Wouldn't be able to feed from a mag unless you do something radically different, and given the investment required to make this happen it really makes more sense to me to just purchase a bolt gun chambered in .300wm. You do realize, that a 5.56mm nato cartridge is 2.25" long and a .300WM is 3.340" long right? Yep, I know what the challenges are, however I had heard from someone that someone was making one already, hence my desire to see what was out there. It may end up being a custom project for me. Any other help sourceing is greatly appreciated. 
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.300WSM? Is anything available in that caliber as well as a potential project?? Thanks Looks like this shop is doing the Rem short mag, Rem Short Mag ARs |
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I think both Armalite and DPMS used to make 300 RSAUM rifles, but they seem to have been discontinued. The cartridge is a little less powerful than a 300 Win Mag or 300 WSM.
I guess the 300 WSM is less than ideal for a semi-auto rifle: AMU's first focus in this informal project centered on Winchester's .300 WSM cartridge. That initial focus determined that the .300 WSM, while an excellent cartridge in a bolt-action rifle, was not particularly suitable for a semi-automatic rifle. Internally, the sidewalls of the .300 WSM case come straight down forming nearly a right angle where they meet with the flat bottom at the cartridge web. That right angle gives the WSM a smidgen more case capacity, but results in a web too thin to support the case in semi-auto operation. AMU found that in a semi-auto, the WSM cases exhibit some bulging ahead of the extractor groove. Remington's .300 SAUM, on the other hand, has internal case sidewalls that come down and form a distinct angle before transitioning to the flat bottom surface. That slight bit more web thickness made the difference as far as AMU was concerned, so development was refocused around the SAUM.
http://www.shootingtimes.com/longgun_reviews/ST_ar10ultra_062309/ |
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