MIL-STD-1258(WC)
30 June 1972
1.
SCOPE
1.1 This document establishes visual comparison standards for
workmanship type defects in chromium plated 5.56MM, 7.62MM, and Cal .30
barrel bores.
1.1.1 The type of defects covered herein are nonmetallic inclusion
defects, machining defects and chromium plating defects.
1.2 Application. This document is intended for use in determining
the acceptability of the interior surfaces of 5.56MM, 7.62MM, and Cal .30
barrels after chromium plating and high pressure proof testing.
1
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