Quote:
Originally Posted by leblanc74
I just use a DPMS armored wrentch and use my hand.....by using your hands by holding the receiver in one and the other having that wrentch it gives the stress some release, and placing that upper in a vise well the stress has to go somewhere... .
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Yes it goes in the upper mold thats made specifically to relieve the stress from the upper.
People who break their uppers don't use the upper mold vise.