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11/9/2008 9:19:24 AM EDT
Im looking at some some lowers and they advertise one as being or having some ceramic in it  and its like 20 bucks cheeper than the standard alum.. and that its more durable  is this true or should i stick to the Alum
11/9/2008 9:30:08 AM EDT
[#1]
That's very interesting,i'd like to see  it!
11/9/2008 10:04:02 AM EDT
[#2]
it might be ceramic coated similar to some barrels for some unknown reason...

Got a link?

Very Curious.
11/9/2008 10:07:26 AM EDT
[#3]
Are you referring to the CMX/Ceramic Metal Matrix lowers?
11/9/2008 12:25:32 PM EDT
[#5]


That's what I was thinking, but he didn't say 80%.  I don't know of any 100% manufactured receivers in CMX.
11/9/2008 3:50:25 PM EDT
[#6]
yep thats the  web site i was looking at the CMX  so any experience w  or  on them
11/9/2008 5:10:43 PM EDT
[#7]
I bought one of these from Tannery Shop several years ago.

It machines just like a cast lower.

The big advantage from a home shop perspective is they don't need anodizing to obtain their wear resistance.  I would not know; I don't shoot it enough to see any abnormal wear.
11/9/2008 6:16:18 PM EDT
[#8]
Specialized aluminum bicycles were made with a metel matrix stuff I think they had ceramic in them.  I am not sure if they still do or if it just a gimmick that went away.

for whatever that is worth
11/9/2008 6:27:18 PM EDT
[#9]
I suppose it's worth mentioning that that lower is not ready to assemble and requires a bunch of machining processes.
11/9/2008 6:37:58 PM EDT
[#10]
Yes supposedly you cant anodize them because of the ceramic content.
They are allot more work than the forged lowers.
You have to file the mag well allot.
The top surface of mine had to be filed or machined down by about 0.03.
And because of that I had to re-cut the 1.5" diameter curve that mates with the uppper.
Couldn’t just slap it in the drill fixture and go.
Need to check by measuring from the top surface to the bottom of the mag catch pocket, it should be 0.335. I’d check allot of other dims too before starting.

Not a bid deal if you have a milling machine.
I'd pay the extra and get the forged ones.
And if you didn’t want to send it off to get anodized, put 3 or 4 coats of cerakote on it.
And maybe gunkote over that if you wanted a different color.
You can get cerakote at caswell plating.
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