Lower Receiver And Extension Assembly Cont

LOCATION

ITEM

ACTION

REMARKS

a - shiny surfaces (reparable)

b - corroded (reparable)

Inspect for corrosion. Repair or replace if defective.

thin walls holes

M16 Corrosion Repair

c - holes an d thin walls (nonreparable)

Lower Receiver and Extension Assembly

All parts

Repair or replace if defective.

For stock repair, see TM 9-1005-301-30 w/C1.

Weapon

Lower receiver and exten sion assembly

M16 Parts Assembly Quiz Lower Receiver Assembly

Test lower receiver pivot pin lug clearance using fabricated lower receiver go-no go gage (E-5, appE).

If lower receiver go-no go gage (E-5, app E) enters far enough to pass or cover the entire pivot hole, the rifle is unserviceable and will be turned in for replacement.

If lower receiver go-no go gage (E-5, app E) does not enter or enters but does not pass or cover the entire pivot pin hole, the receiver is still serviceable in this condition.'

Do not force gage to fit between pivot pin lugs.

PPPPĂ„I

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B - SERVICEABLE

C - UNSERVICEABLE

3-56

12006472 Gauge

location item action remarks

Test two hammer pin holes and two trigger pin holes using not-go plug gage 12006472.

If the not-go plug gage passes through any one of the four pin holes, the rifle is unserviceable and will be turned in for replacement. The gage must penetrate through the wall thickness to be unserviceable.

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