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The Range
NFA & Class III Discussion
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<blockquote data-quote="Glocktogo" data-source="post: 2842228" data-attributes="member: 1132"><p>If ammo commonality isn't an issue for you, 6.8 spcII gives the best ballistic results in 16-18" uppers, whereas 300 blk is great in the short barrels. They can both be made to perform in either role, but work best in their respective original configuration. </p><p></p><p>I went with a 16" 6.8, a pinned 14.5" 5.56 and will eventually build an 8-9" .300 blk with a Silencerco Omega type can.</p></blockquote><p></p>
[QUOTE="Glocktogo, post: 2842228, member: 1132"] If ammo commonality isn't an issue for you, 6.8 spcII gives the best ballistic results in 16-18" uppers, whereas 300 blk is great in the short barrels. They can both be made to perform in either role, but work best in their respective original configuration. I went with a 16" 6.8, a pinned 14.5" 5.56 and will eventually build an 8-9" .300 blk with a Silencerco Omega type can. [/QUOTE]
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