If you're specifically talking about the SOCOM barrel is a lil heavier, yes. It was originally intended for specops use. The practical advantage, if you want to call it that, has to due with sustained or cyclic ROF. Barrel shouldn't heat as quickly, but doesn't cool down as quickly either like a gov't profile does. Yes, cyclic & sustained ROF's are employed in certain situations. Any M4 with FA capability will never be able to fairly compete with a M249 or MG, however, if the unit in contact or trying to break contact doesn't happen to have a LMG or MG in possession then the FA M4 will serve the purpose with what's available. My CMMG medcon accepts a KAC RAS with no probs.
Originally Posted by wild_wild_wes
Weight is an issue with specops & line infantry ops, but I wouldn't & don't complain about having the SOCOM barrel. Some operator's opinions differ, however. It's really not that much heavier considering most of the rifles it's installed on are tricked out with other weight adding accessories, toys, goodies or whatever you want to call 'em.
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