Could this work? - The Firearms Forum

LoneWolf · 10-06-2008, 03:31 PM

I am new to the AR-15 platform rifle. I found out that I might be able to make a conversion for one in the .45 Win Mag if I have a custom barrel made for it if I get the Olympic Arms .45 ACP Bolt assembly and extractor. My main concern is pressure. The .45 ACP only creates about 23,000 CUP for the +P loads I believe and the .45 Win Mag has a maximum of about 40,000 CUPs of pressure. Would the bolt be able to handle the higher pressures of the .45 Win Mag? I know that the springs wouldn't be able to so those will be swapped out for stronger ones, and I could customize a .308 Winchester magazine to be able to take .45 Magnum, so those areas aren't a consern. I just want to know if the bolt would be able to take the excessive beating, because I don't really know. Thanks for your opinion, and any info helps.
Lone Wolf

artabr · 10-07-2008, 12:19 AM

LoneWolf, here are a couple of companies that you may want to contact that may be able to answer your questions.
Alexander Arms makes the .50 Beowulf on the AR-15 platform.

http://www.alexanderarms.com/contact.htm

Fulton Armory does some custom AR work, they may be able to help you out.

http://www.fulton-armory.com/

Art

JLA · 10-09-2008, 08:42 PM

look into the .458 socom. all you need is an upper. it works with standard .223 mags and the standard bolt too. the .458 socom is a big bore powerhouse with a rebated rim for the AR platform that utilizes massive knockdown power from carbine length barrels. all you need is a standard AR-15 and a barreled .458 upper. you can go from woodchucks to bears with the simple popping of 2 pins...

LoneWolf · 10-11-2008, 11:43 AM

Quote:

Originally Posted by JLA

look into the .458 socom. all you need is an upper. it works with standard .223 mags and the standard bolt too. the .458 socom is a big bore powerhouse with a rebated rim for the AR platform that utilizes massive knockdown power from carbine length barrels. all you need is a standard AR-15 and a barreled .458 upper. you can go from woodchucks to bears with the simple popping of 2 pins...

Thanks for the tip on a caliber. It is an interesting one, but not what I am looking for. I am more over looking to build one in .45 win mag because I have a L.A.R. Grizzly Mark I that is made in .45 magnum and would like to have a companion rifle. Thanks again for the tip.
Lone Wolf

LoneWolf · 10-11-2008, 11:44 AM

Thanks to all who have viewed this and who have posted, but I have already found everything I need to make the AR-15. Thanks again.
Lone Wolf

artabr · 10-12-2008, 01:11 AM

Quote:

Originally Posted by LoneWolf

Thanks to all who have viewed this and who have posted, but I have already found everything I need to make the AR-15. Thanks again.
Lone Wolf

Lone Wolf, keep us posted on how it works out.

Art

LC450 · 03-15-2009, 02:53 PM

Hello all. LoneWolf, Back in the day when it was hot idea to own a 45 win mag, in the early 90's I built a 45 win mag AR using all Olympic arms parts. Oly's carbine 45ACP barrel, rotating bolt and utilizing a 6" gas system, and the regular AR-15 mags with the Fulton Armory blue single stack follower. The same followers used for the 450 Bushmaster. The AR-15 can handle just over 60,000 CUPs maybe a little more. The problem now is finding ammo, I do reload myself but, I'm just getting tired of the 45 win mag.... LoneWolf, Have you ever thought of a 450 Bushmaster, it's Much, Much hotter than the 45 Win Mag .

I built myself 450 Bushy using Oly's barrel since it's a 1 in 16 twist much better twist rate for the 45cal 300 grainer's.

I'm in the process now taking my AR in 45 win mag and converting it to what I'm calling a 10 MM magnum I'm using the Olympics 10mm carbine barrel, still utilizing the 45 win mag case but necking it down to a 10mm or (.40 S&W). I'm also doing what I'm calling 10MM Mag Express utilizing a 450 Marlin case and necking it down to a 10MM, for use in AR-15 rifles

10-06-2008, 03:31 PM	#1
LoneWolf Member Join Date: Aug 2008 Posts: 19	Could this work? I am new to the AR-15 platform rifle. I found out that I might be able to make a conversion for one in the .45 Win Mag if I have a custom barrel made for it if I get the Olympic Arms .45 ACP Bolt assembly and extractor. My main concern is pressure. The .45 ACP only creates about 23,000 CUP for the +P loads I believe and the .45 Win Mag has a maximum of about 40,000 CUPs of pressure. Would the bolt be able to handle the higher pressures of the .45 Win Mag? I know that the springs wouldn't be able to so those will be swapped out for stronger ones, and I could customize a .308 Winchester magazine to be able to take .45 Magnum, so those areas aren't a consern. I just want to know if the bolt would be able to take the excessive beating, because I don't really know. Thanks for your opinion, and any info helps. Lone Wolf -->

10-07-2008, 12:19 AM	#2
artabr Advanced Senior Member Join Date: Mar 2008 Location: New Iberia, Louisiana Contributor Posts: 7,859	Re: Could this work? LoneWolf, here are a couple of companies that you may want to contact that may be able to answer your questions. Alexander Arms makes the .50 Beowulf on the AR-15 platform. http://www.alexanderarms.com/contact.htm Fulton Armory does some custom AR work, they may be able to help you out. http://www.fulton-armory.com/ Art __________________ God and the soldier we like adore, In times of trouble, not before. When troubles ended and all things righted, God is forgotten and the soldier is slighted. Francis Quarles 1592 - 1644 __________________ When asked for my race, I answer CauCajun. Hope is not a plan, and not all change is good. The resistance is here; the resistance is now. RESIST! These hands are neither cold nor are they dead!! Last edited by artabr; 10-09-2008 at 10:20 PM..

10-09-2008, 08:42 PM	#3
JLA TFF Moderator/Host Join Date: Feb 2007 Location: Heart Of Texas Contributor Posts: 17,322	Re: Could this work? look into the .458 socom. all you need is an upper. it works with standard .223 mags and the standard bolt too. the .458 socom is a big bore powerhouse with a rebated rim for the AR platform that utilizes massive knockdown power from carbine length barrels. all you need is a standard AR-15 and a barreled .458 upper. you can go from woodchucks to bears with the simple popping of 2 pins... __________________ It takes 43 muscles to frown, 17 to smile, and 3 for proper trigger squeeze. The latest caliber or gear is no substitute for experience and skill. Rifles and cartridges don't make hits -- shooters do. Fact of life: After Monday and Tuesday, even the calendar says WTF!

10-11-2008, 11:44 AM	#5
LoneWolf Member Join Date: Aug 2008 Posts: 19	Re: Could this work? Thanks to all who have viewed this and who have posted, but I have already found everything I need to make the AR-15. Thanks again. Lone Wolf

03-15-2009, 02:53 PM	#7
LC450 Member Join Date: Mar 2009 Location: The Peoples Republic Of WA State Posts: 1	Re: Could this work? Hello all. LoneWolf, Back in the day when it was hot idea to own a 45 win mag, in the early 90's I built a 45 win mag AR using all Olympic arms parts. Oly's carbine 45ACP barrel, rotating bolt and utilizing a 6" gas system, and the regular AR-15 mags with the Fulton Armory blue single stack follower. The same followers used for the 450 Bushmaster. The AR-15 can handle just over 60,000 CUPs maybe a little more. The problem now is finding ammo, I do reload myself but, I'm just getting tired of the 45 win mag.... LoneWolf, Have you ever thought of a 450 Bushmaster, it's Much, Much hotter than the 45 Win Mag . I built myself 450 Bushy using Oly's barrel since it's a 1 in 16 twist much better twist rate for the 45cal 300 grainer's. I'm in the process now taking my AR in 45 win mag and converting it to what I'm calling a 10 MM magnum I'm using the Olympics 10mm carbine barrel, still utilizing the 45 win mag case but necking it down to a 10mm or (.40 S&W). I'm also doing what I'm calling 10MM Mag Express utilizing a 450 Marlin case and necking it down to a 10MM, for use in AR-15 rifles