Mil-spec or commercial?

scott_r

scott_r

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Im looking to replace my factory XCR stock with a MagPul CTR and am wondering whats better Mil-spec or commercial? Are they interchangeable where they meet at the reciever or is it specific to each rifle? Is one better then the other?


Cheers!!
 
Not only that, milspec is cooler.:p I shouldn't joke though, I have a milspec tube and stock sitting here waiting for something to put them on.
 
CTR_Stock_Specs.jpg


Whats with the different measurments at the tubes of these 2? Seems like the mil-spec is smaller in diameter but bigger threads vs the commercial?

Cheers!!
 
On a side note... While Milspec parts are normally easier to get... Commercial tubes seem to be cheaper.

But, you should use whatever your lower is threaded for.
 
You can also get 6 position (hole or what ever you call it) mil spec buffer tubes also as opposed to 4 in the pic above.
 
noelb said:
Hmm. I understand the Norc is commercial. What is different about the threat and pitch?
Click to expand...

Are the treads on Norincos not metric?

I know people who've tapped Norc receivers over the existing threading so their buffer tube would fit. Others have just cross threaded their tube on.

Maybe it was the earlier Norc versions. I don't own one, nor care to.
 
The Milspec tube is supposedly machined from a forging -

The commerical tube, at least in the past, for some companies, are extrusion tubes wielded shut at the end.
 
The Milspec tube is supposedly machined from a forging -

The commerical tube, at least in the past, for some companies, are extrusion tubes wielded shut at the end
Click to expand...

I here this a lot and I don't believe it to be true (not offense GT :) )

A) extruding is a form of forging, it's just like the 'play-doh fun factory' instead of hammering it between two dies.

B) I have never seen, nor has anyone been able to show me, an example/picture of a tube that has a endplate welded on

C) You would be able to visually see that something had been welded on. Anodizing hides nothing, whether it's clear, colour, hard, or black-hard, you will be able to see the weld like a sore thumb

Maybe a mil-spec tube is stronger,.but unless you're using your rifle as a pry bar or a baseball bat, you're never going to have an issue. That being said, Mil-spec is definitely cooler ;)

ADDED
the threads ARE full diameter on a mil-spec tube as opposed to 'topped' on a commercial - this is the source of the 'weakness' of a commercial tube as opposed to a mil-spec
 
I'm under the impression that there isn't really any advantage between the two types now (maybe in the past but I don't know). With that being said...I tend to choose mil-spec for my black rifles because it just sounds better (and the cost is the same so why not?).
 
It would look to me the reason for the smaller diameter on the mil spec tubes is because the threads are rolled?
Anyone know if this is true?
 
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