MIL-DTL-45500E
assemble and disassemble from the rotor assembly without the use
of tools.
3.3.1.1 New barrels. New barrels shall be free of cracks,
seams, and mutilations. The bore and chamber shall be free of
foreign matter, corrosion, pits, burrs, sharp edges, bulges and
deformations. The chromium plating in the chamber and bore shall
be free of nodules, anode burns, flaking and stripping. Scratches
or marks in the chamber which meet the surface roughness require-
ments shall be permitted provided they do not cause marks on the
case of a high pressure test cartridge fired in the chamber. New
barrels shall be marked for proof firing and magnetic particle
inspection in accordance with applicable drawings.
3.3.2 Barrel clamps. Unless the gun is procured without
barrels the barrel clamps shall be fastened securely to the
barrels as specified on the applicable drawing.
3.3.3 Breech bolt assemblies. The breech bolt assemblies
shall be marked in accordance with the applicable drawings after
being proof fired and magnetic particle inspected. The breech
bolt assemblies shall move without binding on the trackways of
the rotor. The roller, shaft, locking block, firing pin cam, and
the firing pin shall be retained in the breech bolt body and
shall move without binding. The firing cam pin insulator and the
firing pin insulator assembly shall be retained in the breech
bolt body. When the shaft assembly is depressed, the locking
block shall move into the lock position and shall allow the
firing pin cam to be fully depressed. When the firing pin cam is
depressed, it shall move the firing pin forward. When the shaft
assembly is raised, the locking block shall move to the unlocked
position, the firing pin cam shall return to its original posi-
tion, and the firing pin shall retract into the breech bolt body.
3.3.4 Cams, locking and unlocking. The locking cam and
front and rear unlocking cams shall be positioned and securely
fastened to the housing assembly in accordance with the
applicable drawings.
3.3.5 Clearing sector assembly. The clearing sector
assembly shall be retained on the housing assembly by the spring
pin and shall function through its full range of travel without
binding. When the clearing sector is manually moved into
clearing position and the rotor is manually rotated in the
direction of the arrow, the breech bolt assemblies shall enter
the clearing track of the housing without sticking or binding.
When the clearing sector assembly is released out of clearing
position by its return spring and the rotor is rotated, the
breech bolt assemblies shall enter the main cam of the housing
without sticking or binding. This is applicable to all guns
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