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10/24/2014 3:13:49 PM EDT
looking to do a 308 build, ill probably buy an assembled upper, (im aware that voids the classification of a 'build') my question lies in the buffer extension. i have a few extra 556 mil spec buffer tubes laying around, can i use one of them?

ive heard people say yes, i've seen people say no. is it a matter of what spring or buffer you use.. or are the dimensions of the tubes incompatible?
10/24/2014 4:04:09 PM EDT
[#1]
Yes, you can use the AR15 tubes, as the original KAC SR25K was built using a Mil-spec Colt stock.

DPMS basically copied that, but with cheaper components when they introduced the AP4.  The buffers are very short, but with a stronger and longer recoil spring than an AR15 carbine.
10/24/2014 8:27:17 PM EDT
[#2]
Quote History
Quoted:
Yes, you can use the AR15 tubes, as the original KAC SR25K was built using a Mil-spec Colt stock.

DPMS basically copied that, but with cheaper components when they introduced the AP4.  The buffers are very short, but with a stronger and longer recoil spring than an AR15 carbine.
View Quote



Noticeably stronger spring.
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