Carmac Calico AR-15 MAC 9mm Upper

[flyman]

Well here is some weight specs for those interested. 1. lower receiver. 2. 50 round drum with 115 grain. 3. 100 round drum with 115 grain.

 

[flyman]

1. upper without bolt, bolt retainer cap and pins. 2. upper with bolt, cap and pins. 3. upper and lower.

 

[flyman]

4. carmac with loaded 50 round drum, 115 grain. 5. carmac with loaded 100 round drum, 115 grain.

 

[flyman]

Ok..... According to UZI's own web site.

The UZI SMG weighs 3500 grams(7.71 lbs) without magazine.
CARMAC comes in at 6 lbs, 5 ounces, WITH A LOADED 50 ROUND DRUM!!!!

AND!!!!

The UZI SMG with a loaded 25 round mag comes in at 4000 grams (8.8 lbs).
CARMAC comes in at 0.8 ounces over 8 lbs.... WITH A FULLY LOADED 100 round drum.....

BEAT THAT!!!!

http://www.uzi.com/firearms/

 

[Vegas SMG]

From a control side, I'm not sure I'd want my transferable full auto Uzi to be much lighter. The biggest part of it's weight comes from the bolt followed by the 10 1/2" barrel which is much more substantial than the M-11/9 barrel. There's also the issue of weight from that pesky shoulder stock. I think you should have used the Mini or Micro Uzi pistol as a better size versus size comparison. Using a full size, full auto Uzi isn't an accurate comparison. OAL as well as height dimensions would be interesting to note and of course there's the 100 round Beta C drum option that's available for the Uzi.

That aside, I'd think your target market would be the AR-15/M-16 owners, so those forums might be of some benefit with input on your project. I have a 9mm Beta C for my M-16/9mm conversion, but I'm not sure what that total weight is. Obviously the weight would be with the buttstock and buffer the system requires.

I'm not sure if it's been mentioned, but some years back, Calico spun up the "MAC" community with promises of a drum fed upper. Less than a dozen were produced and I believe some owners are still owed product or money. http://calicolightweaponsystems.com/forum/viewforum.php?f=1&sid=61e8104c65f9569dfbd55a88d0b2157f

When you get the bugs ironed out, bring it to Las Vegas and maybe we'll run it on my M-16 lower. I do have concerns about hammer pin hole wear with a blow back 9mm upper.

Best of luck!

 

[flyman]

Calico/mac is what gave me the idea. If I compare it to the micro uzi. Weight and barrel length are the same w/o magazine. This same design can be made for a mac or cobray. Im not there yet. This is just a proof of concept and im gauging interest in it. The next prototype will be with a 16 barrel.

Should I make my next prototype an upper for a mac/cobray?

I do appreciate your offer of using an m16 lower. That is a few prototypes away. I did reverse ramp the bolt for the width of the hammer and at the same angle. I understand the semi hammer on mac is waay lighter and shorter than an AR hammer. The hammer pin location is also waay closer to the firing pin than an AR. But only testing on the semi lower will be proof over time and round count.

I don't plan on getting rich. Just want to come up with something simple and different. I can make a simpler version of the calico/mac upper, for semi and full auto. Not that hard to do at all. The only bug was the feed ramp angle as with all mac/cobray/lage and others. From the prototype I have all the dimensions and patterns to make uppers. With the simplest of construction and keeping it as simple as possible. Now I can get water jet cut parts and make a pistol/carbine AR15 upper, or even pistol/carbine mac upper. I just needed to make the prototype to get the desired measurements. It opens all kinds of possibilities.

 

[flyman]

Weight of the butt stock assembly minus buffer and buffer spring.

 

[flyman]

CARMAC Carbine..... ready for testing.....

 

[06sandstone]

Congrats . Good luck on the test.

 

[bigmacster]

View attachment 30159View attachment 30160View attachment 30161CARMAC Carbine..... ready for testing.....

Is that full auto?

 

[flyman]

No. not full auto. It can be made that way. By the addition of a disconnector rod. But would only work on a full auto lower. Maybe if someone had a full auto lower I could test it on. But that is way in the future. I did my second test fire last week. It was worse than the first test fire. On the first test fire, I was getting failure to feed. :bang The bottom of the case was kicking up and the bolt was slamming the round into the feed ramp. So... I cut off the magface and relocated it 1/8 further back and rewelded. So... On my second test fire the bolt was getting jammed all the way back, or it would short stroke and not cock the hammer. BUT!!!! It fed every round reliably. "That is" when the bolt didn't short stroke or get jammed open. Anyway I found the problem. The slot for the side charger was bent in slightly, and the harder you pull on the charger the worse it got. I did heat treat it originally. But Obviously it wasn't strong enough. Tapped the flared edge and now it doesent jam up.

So here is test #2 frustration and all.

https://www.youtube.com/watch?v=Fj0EHuUD5Qg

Im confident the next test round will be flawless....

 

[flyman]

 

[Schnitzeraffe]

Good work.

And entertaining...

I'll stay tuned for episode 4.

 

[~Josh]

@ 7:50 -remember what I said? haha

Seems to work decently. Helluva to-do list though.

 

[flyman]

Yeah... I hear ya. But I knew better than to cut too much off the recoil spring. Made a new rear mount and welded it on today. Was off just 0.10 of an inch. I think (hope) this was the last gremlin.

Next trip out. I hope to make a vid of it firing with an ar15 upper then switch to the carmac upper. And then for grins, I wanna test the feeding reliability and load up the 50 round drum with hollow points and see how it functions. More to come....

 

[flyman]

IM ready for test fire #4.

 

[flyman]

SUCCESS!!!!!!!!!!!!!!!
https://youtu.be/xvLwFDDYY3E

 

[Schnitzeraffe]

Cool dude! :thumbs_up

 

[rybread]

Nice work flyman- that thing is a beast!!

 

[rhouston8]

Impressive. You are a masochist for tackling such a project.