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AR15.COM
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5/6/2010 7:39:01 AM EDT
I have a DDm4 16 inch carbine and i just bought a bcm mk12 mod 0 upper for it.It currently has a H buffer,do i need to change it to something else?
5/6/2010 7:44:44 AM EDT
[#1]
Have you shot it yet?  Did it work?
5/6/2010 7:56:28 AM EDT
[#2]
nope havent shot it yet
5/6/2010 8:15:03 PM EDT
[#3]
Do that first.  If it works, leave it alone.  If not, let us know and we'll figure out a solution.
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