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The Basics, Starting Out
AR10 - can 6.5CM and 308Win uppers use same lower (buffer/spring)?
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<blockquote data-quote="MarkAnthony" data-source="post: 2761384" data-attributes="member: 125824"><p>From the OP: </p><p>"with the 6.5CM: either failure to fully lock into battery, or failure to eject properly and getting jammed w subsequent round. Also, sometimes is prone to not locking back w an empty mag."</p><p></p><p>If the bcg does not lock back on an empty magazine when a single round is fired, it would seem that it is not getting enough gas to cycle or the buffer/spring combination is providing too much resistance. If it's the same buffer/spring combination as you are using for the 308 upper, then I would check gas port alignment between the gas block and barrel gas port. Checking to see if the bolt locks back on a single round is the first test on a new AR setup.</p></blockquote><p></p>
[QUOTE="MarkAnthony, post: 2761384, member: 125824"] From the OP: "with the 6.5CM: either failure to fully lock into battery, or failure to eject properly and getting jammed w subsequent round. Also, sometimes is prone to not locking back w an empty mag." If the bcg does not lock back on an empty magazine when a single round is fired, it would seem that it is not getting enough gas to cycle or the buffer/spring combination is providing too much resistance. If it's the same buffer/spring combination as you are using for the 308 upper, then I would check gas port alignment between the gas block and barrel gas port. Checking to see if the bolt locks back on a single round is the first test on a new AR setup. [/QUOTE]
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AR10 - can 6.5CM and 308Win uppers use same lower (buffer/spring)?
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