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The Range
NFA & Class III Discussion
Is SBRing an AR worth it?
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<blockquote data-quote="Koshinn" data-source="post: 1648872" data-attributes="member: 18314"><p>Shortening a barrel reduces muzzle velocity. The lower muzzle velocity, the shorter range at which a 5.56 FMJ round will fragment. If I recall correctly, a 7.5" barreled AR will never cause a 5.56 FMJ round to fragment, while a 10.5" will fragment at 50yds or so. A 20" M16 will fragment at like 200 yds? And if a 5.56mm round doesn't fragment, it just puts a .22" hole into someone, give or take, with a little tumbling action too.</p><p></p><p>Now a JHP or JSP round doesn't require fragmentation and will expand even out of a 7.5" AR, so there's always that. But with mil rounds, you need more velocity.</p><p></p><p>Super Dave - Yeah, I'm considering changing my SBR into a pistol caliber.</p></blockquote><p></p>
[QUOTE="Koshinn, post: 1648872, member: 18314"] Shortening a barrel reduces muzzle velocity. The lower muzzle velocity, the shorter range at which a 5.56 FMJ round will fragment. If I recall correctly, a 7.5" barreled AR will never cause a 5.56 FMJ round to fragment, while a 10.5" will fragment at 50yds or so. A 20" M16 will fragment at like 200 yds? And if a 5.56mm round doesn't fragment, it just puts a .22" hole into someone, give or take, with a little tumbling action too. Now a JHP or JSP round doesn't require fragmentation and will expand even out of a 7.5" AR, so there's always that. But with mil rounds, you need more velocity. Super Dave - Yeah, I'm considering changing my SBR into a pistol caliber. [/QUOTE]
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Is SBRing an AR worth it?
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