The Relationship Of Barrel Extension Diameter To Accuracy In The AR-15, Part 2
Further quantifying the accuracy gains from the proper fitting of the barrel extension to the receiver, rebarreling and the new custom BAT Machine oversize extensions.
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The Relationship Of Barrel Extension Diameter To Accuracy In The AR-15, Part 1
Slop in fitting the barrel extension to the upper receiver can rob your rifle of its potential accuracy.