Upper Receiver And Barrel Assembly Cont

LOCATION

ITEM

ACTION

REMARKS

b. Helical spring (3) and front sight detent (4)

Position and depress helical spring and front sight detent with punch.

M16 Rifle Upper Receiver Diagram

Install using fabricated tool (E-1, app E).

FRONT SIGHT POST REMOVING AND INSTALLATION

TOOL

Install using fabricated tool (E-1, app E).

FRONT SIGHT POST REMOVING AND INSTALLATION

TOOL

M16 Rifle Upper Receiver Diagram
DEPRESS DETENT

NOTE

Do not disassemble unless repair is necessary

Upper Receiver and Barrel Assembly

Retaining ring (1), ejection port cover pin (2), helical spring (3), and ejection port cover (4)

Using two flat tip screwdrivers, remove retaining ring and slide ejection port cover pin out to the rear.Catch helical spring and ejection port cover to prevent loss.

Ejection Port Cover

Ejection port cover pin may bind against the forward assist housing on the M16A1 rifle and require some additional force to remove.

LOCATION

ITEM

ACTION

M16a1 Rear Sight Adjustment Tool

Upper Receiver and Barrel Assembly

All items

Inspect for serviceability

REMARKS

If items are damaged or non-functional, they are unserviceable.

M16a1 Upper

Upper Receiver and Barrel Assembly

All authorized items

Replace if unserviceable.

REASSEMBLY

Upper Receiver and Bi;i rel Assembly

Ejection port cover (1), helical spring (2), ejection port cover pin (3), and retaining ring (4)

Position cover and spring. Slide in cover pin and install retaining ring using tweezers or ro'Md nose pliers to position ring.

M16a1 Naming The Parts
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