I have a barrel assembly and a stripped receiver. What is needed to install the barrel? I've seen M1icon armourer's wrenches for sale for around $80, and I know there are supposed to be index marks on the barrel and receiver that you line up. But is there a proper way to mount/hold the receiver in a vise to prevent damage, and will the rifle automatically be headspaced with any M1/M2 bolt if the index marks are lined up? Or is it better to just bring the parts to a qualified gunsmith and have him do it? That way I wouldn't have to buy the wrench or any specialty tools.

Thanks
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