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Posted: 4/23/2016 4:22:43 PM EDT
Assembling my first DPMS pattern AR (done a bunch of AR-15's) and the barrel extension will only go in about 1/8-3/16", ARGH!!!!!  Upper is Cross Machine and Tool and the barrel is Faxon 20".  
I'm not going to use a hammer, would cooling the barrel and heating the receiver be proper or would I risk cracking a very expensive receiver once it cools?

HELP!!!!!!!!!!!!!!!!!!
Link Posted: 4/23/2016 5:17:47 PM EDT
Link Posted: 4/23/2016 5:32:22 PM EDT
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Quoted:


Yes, do exactly that. It will not hurt either part and you will have a fantastically fitted set once complete.
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Quoted:
Quoted:
would cooling the barrel and heating the receiver be proper or would I risk cracking a very expensive receiver once it cools?



Yes, do exactly that. It will not hurt either part and you will have a fantastically fitted set once complete.


Put the upper in the oven at 200 degrees and put the barrel in the freezer, slip fit.  This is a nice looking barrel hope it shoots like it looks.

Thanks!!!!!!!!!!!!!!!!!!!!
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