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9/22/2017 12:11:25 AM
Posted: 8/1/2005 4:23:26 PM EDT
I have been contemplating getting a Cav arms lower to start making into a pistol caliber rifle. From what I have gathered, they seem to be the best way to go if I want to do one in .45. That's fine with me, because they also seen to be the most cost effective. I will admit I'm lost when it comes to uppers though, can someone steer me in the right direction? I would like to piece it together as I accquire funds, but I have a feeling I might be better off saving and buying a complete assembled upper. Any words of advice?? TIA, Bill
Link Posted: 8/1/2005 6:18:25 PM EDT
[Last Edit: 8/1/2005 6:19:22 PM EDT by brushdog]
Olympic Arms 45 cal complete uppers run from $400-600 for used-new. You can find them on the EE or from one of their distributors like Atlantic Firearms. www.atlanticfirearms.com/

You can get the grease gun mag adapter from brownells. www.brownells.com


Grease gun mags
www.northridgeinc.com/machine_gun_parts.htm

www.e-gunparts.com/product.asp?chrProductSKU=198850B

www.keystonearms.com/mags~non.html
Link Posted: 8/1/2005 8:03:58 PM EDT
Great info, thank you.
I was wondering also, do you use the .223 recoil spring/buffer assmembly or is there a .45 specific one?
Link Posted: 8/3/2005 7:44:20 PM EDT

Originally Posted By Unka-Boo:
Great info, thank you.
I was wondering also, do you use the .223 recoil spring/buffer assmembly or is there a .45 specific one?


You can use the spring but you need to use a heavy buffer. Thats all I got
Link Posted: 8/3/2005 9:33:27 PM EDT
THE .45 ACP thread
45 ACP, CavArms-Hahn Block-Grease Gun Mags-Oly Upper

Explains the need for buffers, links to Slash's custom buffers, drawings to make your own, plus a lot of Lessons Learned by other builders.
Link Posted: 8/3/2005 11:16:00 PM EDT
Here is my thread on my set up....

My Review....
Link Posted: 8/4/2005 5:07:54 AM EDT
Thanks guys!
Link Posted: 8/5/2005 3:28:27 PM EDT
Unka........

I'm building one.......do you want me to make a thread on it?
Link Posted: 8/5/2005 4:03:10 PM EDT
That might not be such a bad idea.............I might get jealous though......
Thanks!
Link Posted: 8/7/2005 3:08:06 PM EDT
[Last Edit: 8/7/2005 3:22:23 PM EDT by cheezer]
Yes a thread would be nice. I would like to make one too.
I guess I need a CAV MKII lower, a .45 upper, mag well converter and a heavy buffer. I guess you can use a .45 barrel on a any receiver. What about the bolt?
Link Posted: 8/7/2005 3:16:47 PM EDT
[Last Edit: 8/7/2005 4:45:08 PM EDT by glockguy40]
does the bolt have to be modified??? For 9mm dont you have to ramp your bolt??? Is it the same for .45???

Please forgive my noobness and I might be totally off here
Link Posted: 8/7/2005 10:53:54 PM EDT
[Last Edit: 8/7/2005 10:59:08 PM EDT by Kaliburz]

Originally Posted By glockguy40:
does the bolt have to be modified??? For 9mm dont you have to ramp your bolt??? Is it the same for .45???

Please forgive my noobness and I might be totally off here



I think we are getting pistol cal upper "styles" mixed up here. The two "main" styles are:
1) Colt- there is only 9mm from the factory and clones. Mag well adapter is either 2 piece or single drop in from top or bottom. This style usually gets the carrier machined so it cocks the hammer better. Ejector is on the mag well adapter....usually requires a 9mm hammer or modified 223 hammer to work. Colt style is what RRA "copies". (There has been a custom 357 Sig in Colt style, along w/ some other cals.)

2) Olympic- pistol cal. in 9, 40, 45, 10mm. Uses a cone shaped chamber/ramp. Ejector is a "spring" mounted on the upper unit. System works on any lower w/out any modification (note-ALUMINUM lower, the Cav plastic is exception....don't know about Vulcan Carbon Armide lower...) Oly made/modified mags usually have a spacer welded on so no mag block is required....but mags end up expenisve. SOCOM block used for Sten mags to feed 9mm (and 40) while 45 uses Uzi 45 mags w/ spacer welded on.

3)Weird hybrids.... they are out there..... not worth mentioning since they don't hold a "significant" part of the market.

Any how, there is no need to appologize....most people don't know there are differences between the Colt style and Oly. Note the "blue"....that's the main stuff....
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