Barrel bore and chamber must be clean and dry before the following inspections

4. Visually inspect Bore (8) and Chamber (9) for pits, using the following criteria:

a. Pits in the Chamber (9) are allowable if they are not large enough to cause extraction difficulties. If extraction difficulties are experienced, replace barrel.

b. Pits in the Bore (8) are allowed if they are less than the width of a land or Groove (10) in width or length. If pits are greater than the width of a land or groove in width or length, replace.

M60 Machine Gun Parts

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