M-15 Lower? - AR15.Com Archive

M-15 Lower?

killintime [Team Member]

5/13/2011 8:58:19 AM

Trading out the collapsible stock, is the M-15 Lower Mil-Spec on ext, buffer and everything else or do I need to purchase a kit?

mrraley [Team Member]

5/13/2011 9:16:57 AM

The M15 receiver extension tube for the collapsible buttstock is what is considered to be mil-spec.

ArmaLite [Site Sponsor]

5/13/2011 10:29:56 AM

Originally Posted By killintime:
Trading out the collapsible stock, is the M-15 Lower Mil-Spec on ext, buffer and everything else or do I need to purchase a kit?

Yes it's mil-spec. Below is the information in this forum under "ArmaLite Technical Spec Information".

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RECEIVER EXTENSION TUBES

• .223 / .308 rifle length 9-11/16” (inside depth)
• .223 carbine length 6-15/16” (inside depth)
• .308 carbine length 7-5/8” (inside depth)

Commercial size tube O.D. - 1.165” – 1.167” (we don’t use this anymore)
Military (G.I.) size tube O.D. – 1.145” – 1.147” (carbine and rifle)
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BUFFER SPRINGS

• .308 buffer spring rifle and carbine length 14-1/8”
• .223 buffer spring rifle length 13-1/2” max – 11-3/4” min
• .223 buffer spring carbine length 11-1/4” max – 10-1/16” min
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BUFFERS

• .223 rifle length 5-7/8” – weight 5.2 oz
• .308 rifle length 5-3/16” – weight 5.4 oz
• .223 carbine length 3-1/8” – weight 3.0 oz
• .308 carbine length 3-1/4” – weight 5.4 oz
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TR

killintime [Team Member]

5/14/2011 12:32:03 PM

As always, thanks.