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AR15.COM
4/4/2016 2:57:03 PM EDT
What kind of steel is on the ptac upper assesmblies?  4140? 4150?

And how much extra weight does a socom profile add vs the m4 profile?  I haven't bought a rifle in years and have forgotten some of the minutiae.

I'm trying to decide whether to get the ptac middy with the 1/8 socom barrel or the m4 carbine with 1/7 melonite.

The rifle will pretty much be a KISS range toy.
4/4/2016 3:21:29 PM EDT
[#1]
Thank you for your inquiry.

The barrel steel varies depending on the model - it could be either 4150 or 4140.

The Ptac Mid-length will be heavier than the M4.  

In general,  barrel profiles progress up in weight in the following order:  Pencil, ULW, M4, light profile, A2/socom, middleweight, heavy.
4/4/2016 3:24:07 PM EDT
[#2]
Thanks for the speedy reply.  I'm looking at this one

Did I miss it?
4/4/2016 3:41:11 PM EDT
[#3]
Not if you buy it now.
4/4/2016 3:43:51 PM EDT
[#4]
I meant the barrel steel

If it's 4150 I'll buy it right now
4/4/2016 5:56:44 PM EDT
[#5]
As a rule of thumb, If it is not specified in the description, assume 4140.  This sku has a 4150 barrel.
4/4/2016 6:37:56 PM EDT
[#6]
Quote History
Quoted:
As a rule of thumb, If it is not specified in the description, assume 4140.  This sku has a 4150 barrel.
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As promised, order placed
4/7/2016 3:55:16 PM EDT
[#7]
Wow!  Order delivered!!!
4/7/2016 6:45:49 PM EDT
[#8]
that was fast.
4/8/2016 10:55:48 AM EDT
[#9]


4/8/2016 9:17:51 PM EDT
[#10]
What steel on this part# 39236?

Thanks
4/10/2016 2:57:45 PM EDT
[#11]
Quote History
Quoted:


<a href="http://s252.photobucket.com/user/fennrx/media/Mobile%20Uploads/FullSizeRender_zps34cehhbx.jpg.html" target="_blank">http://i252.photobucket.com/albums/hh19/fennrx/Mobile%20Uploads/FullSizeRender_zps34cehhbx.jpg</a>
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nice lookin mfaux