About 10 years ago I purchased a Mk III for $35. Upon close examination The 3 lugs on the rh side of the bolt are sheared off. The serial number on the barrel is PLY 4093. The chamber is marked with an E. The bolt carrier is pinned to prevent misassembly. I have never heard or seen the Rh bolt head lugs sheared off before. Any ideas as to the cause of this happening?
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