Colt Sporter H-Bar - Blue Label - Ammo Question

Graybuzzard

November 15, 2013 13:48

Is it safe to fire 5.56 NATO in a h-bar Colt Sporter stamped Remmington .223? I know that 5.56 NATO develops higher chamber pressures than the Remmington .223.

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  NeoBlackdog

  November 15, 2013 15:45

  Not recommended.
  http://forums.GunBroker.com/topic.asp?TOPIC_ID=585753&SearchTerms=5.56,safe,.223

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  nmyers

  November 16, 2013 03:15

  Most manufacturers of AR-type rifles are inconsistent in the way they mark the caliber on the barrel, magazine, box end label, & catalog.
  
  All Colt AR-15's & variants in good condition can safely fire 5.56 NATO & .223 Rem interchangeably. Apparently Colt tired of answering the thousands of queries per year on this subject, as new rifles are transitioning to both calibers stamped on the receiver.
  
  Neal

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  Txs

  November 17, 2013 06:00

  With only a very few exceptions all Colt AR's are chambered in 5.56.
  
  One way or another, lower receiver caliber markings on an AR really only tell you the general type of round this portion of the rifle is for.
  
  With this design being capable of switching calibers so easily, always refer to barrel markings for confirmation on any AR's chambering.

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