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The Range
Rifle & Shotgun Discussion
300 blackout upper for Colt 6920 223/556 lower
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<blockquote data-quote="k4ylr" data-source="post: 3154722" data-attributes="member: 40231"><p>7.62x39 will offer you similar ballistics for much cheaper ammo. If you're not running a can, it's even more cost effective since shooting 300blk subs would be pointless. A 16" pistol gas should run just about everything</p><p></p><p>If you want parts parity, get 300blk since you can use standard AR mags and 5.56 BCGs are relatively inexpensive.</p><p></p><p>You'll have to hunt around for an assembled upper if you're not looking to build.</p><p></p><p>Then there's 6.5Grendel or 6.8spc if you're feeling really froggy.</p></blockquote><p></p>
[QUOTE="k4ylr, post: 3154722, member: 40231"] 7.62x39 will offer you similar ballistics for much cheaper ammo. If you're not running a can, it's even more cost effective since shooting 300blk subs would be pointless. A 16" pistol gas should run just about everything If you want parts parity, get 300blk since you can use standard AR mags and 5.56 BCGs are relatively inexpensive. You'll have to hunt around for an assembled upper if you're not looking to build. Then there's 6.5Grendel or 6.8spc if you're feeling really froggy. [/QUOTE]
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300 blackout upper for Colt 6920 223/556 lower
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