Miami_M4 Posted August 11, 2005 Share Posted August 11, 2005 Well, it happened to me again! My M4 11707 LE broke over the weekend and this time it is in a different spot. I have less than 350 rounds thru it since I got it back after Benelli replaced the bolt carrier and barrel when it broke the first time. During a routine cleaning and inspection after the shoot, I noticed that the bolt carrier had cracked. The crack is on the left side of the bolt carrier and is just below the bolt head pin cam channel. See Photos: Benelli M4 Cracked Bolt Carrier Pictures I use Remington Game Load #6 2 ¾ inch shells exclusively for the 3-Gun matches I shoot in, and occasionally Remington Slugger Slugs for paper targets in certain stages. It is equipped with the 4-Port “Low Recoil Rounds” barrel that has been the subject of recent threads on this board. After reading a thread “M4 Barrel Markings” posted by STA on 6-11-2005, and analysis by STA and others, I am beginning to believe that you CANNOT shoot “standard load” 2 ¾ shells or 3” shells in a M4 equipped with a 4-Port “Low Recoil Round” barrel. If you do, it will cause “battering” of the gas pistons, and bolt carrier, which in turn will lead to failure. But, if you read the “M4 SUPER 90” Manual (G0093602 – 01/2003) it states on page 72, “Choice of Ammunition” - “The M4 can use 12ga. Shells with 70mm (2” ¾) or 76mm (3”) cases.” So, now what do we do? I certainly do not want to be limited to “low recoil” rounds in my super duper, hardcore, military approved M4! And, for those of you who will say; “if it breaks Benelli will buy me a new one”, what do we tell the family members of the person who was relying on an M4 as a home defense gun, and it broke during an incident that cost them their lives? Quote Link to comment Share on other sites More sharing options...
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