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Posted: 4/1/2006 2:38:04 PM EDT

what's different about the 2 and how can you tell them apart?
Link Posted: 4/1/2006 3:08:39 PM EDT
The Mil-spec CAR buffer tubes like Colt, LMT, CMT/ Stag Arms and Vltor have a smaller outside diameter than the non Mil-spec tubes.

The Mil-spec CAR/ M4 buttstocks will not fit a non Mil-spec tubes but a non Mil-spec buttstocks will fit Mil-spec tubes but with a very loose fit.


"Mil Spec" Receiver Extension/ Stock Tube - Which is Which? thread link


REF: Choosing the Best Collapsible Stock for "You" thread link
Link Posted: 4/1/2006 3:09:31 PM EDT
Link Posted: 4/1/2006 3:32:54 PM EDT

Originally Posted By new-arguy:
I have no idea how there came to be two different dimension tubes. Anyone else know?



Mil-spec tubes have the threads rolled in and then the outside diameter of the tube are machined, but the non-spec threads are cut and the outside diameter are not machined thus the larger diameter.

Rolled process makes stronger threads and prefered by the military, no material are removed in the process.

Non-spec tubes are easier and cost less to make.
Link Posted: 4/1/2006 3:45:45 PM EDT

Originally Posted By new-arguy:
I dont know any way to tell them apart just by looking at them, if someone knows, please chime in. the difference in them is their overall diameter. Milspec size tubes are a smaller diameter than non milspec tubes.

Stocks meant to fit on milspec size tubes, like Vltor, LMT Sopmod stock and others, will not slide on to the larger tubes.

I have no idea how there came to be two different dimension tubes. Anyone else know?



9 out of 10 times and as long as it's in person I can usally tell if one is mil spec or not. I don't know how I can do it I just can.

the reasons I hear why there are 2 different tubes is because it is more of a millling process to take off the extra material on the non spec ones which would add up to more money/time. I don't know if this is true or if I even beleive it but it is a theory I heard and I got it from the internet so take it for what it's worth
Link Posted: 4/3/2006 4:02:39 PM EDT

Originally Posted By Alpha-Romeo3:

Originally Posted By new-arguy:
I have no idea how there came to be two different dimension tubes. Anyone else know?



Mil-spec tubes have the threads rolled in and then the outside diameter of the tube are machined, but the non-spec threads are cut and the outside diameter are not machined thus the larger diameter.

Rolled process makes stronger threads and prefered by the military, no material are removed in the process.

Non-spec tubes are easier and cost less to make.



INTERESTING

WRONG, BUT INTERESTING

OW
Link Posted: 4/3/2006 4:08:13 PM EDT
OverWatch, please explain how it is .
Link Posted: 4/3/2006 4:19:51 PM EDT

Originally Posted By OverWatch:

Originally Posted By Alpha-Romeo3:

Originally Posted By new-arguy:
I have no idea how there came to be two different dimension tubes. Anyone else know?



Mil-spec tubes have the threads rolled in and then the outside diameter of the tube are machined, but the non-spec threads are cut and the outside diameter are not machined thus the larger diameter.

Rolled process makes stronger threads and prefered by the military, no material are removed in the process.

Non-spec tubes are easier and cost less to make.



INTERESTING

WRONG, BUT INTERESTING

OW



expaination
Link Posted: 4/3/2006 4:23:34 PM EDT

Originally Posted By netwt12:

Originally Posted By OverWatch:

Originally Posted By Alpha-Romeo3:

Originally Posted By new-arguy:
I have no idea how there came to be two different dimension tubes. Anyone else know?



Mil-spec tubes have the threads rolled in and then the outside diameter of the tube are machined, but the non-spec threads are cut and the outside diameter are not machined thus the larger diameter.

Rolled process makes stronger threads and prefered by the military, no material are removed in the process.

Non-spec tubes are easier and cost less to make.



INTERESTING

WRONG, BUT INTERESTING

OW



expaination


He just threw a turd in the punchbowl!
Link Posted: 4/3/2006 5:38:53 PM EDT
Milspec = 1.15" OD, rolled threads = stronger

Aftermarket = 1.17" OD, cut threads = weaker
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