Upper Receiver And Barrel Assembly Cont

location item

ACTION

REMARKS

Upper Receiver and Barrel Assembly c. Front sight detent (2) and helical spring <3)

d. Tubular rivet {4) and sling swivel (5)

All items

Catch front sight detent and heli cal spring to prevent loss.

Disassemble only if repair is necessary. If repair is necessary, use hammer and punch to knock out rivet and remove swivel. Discard rivet.

Clean with CLP (item 5, app D)

M16 Rifle Upper Receiver Diagram

Disassemble only if repair is necessary. If repair is necessary, use hammer and punch to knock out rivet and remove swivel. Discard rivet.

Magazine AssemblyM16a1 Swivel Rivet

Upper Receiver and a. Front sight assembty Barrel Assembly b. Front sight area c. Low light level sight (if installed)

d. Barrel

Inspect for chips, breaks, bends, and cracks.

Inspect for evidence of gas leakage around gas tube.

Visually inspect for broken sights and loss of illumination.

Inspect for pits in bore, burrs, broken or worn locking lugs, and surface cracks and defects.

For use on H 3 sight.

Pits no wider than a land or groove and 3/B inch or less in length are allowable in the bore.

Uniformly fine pits in a densely pitted area of the bore are allowable.

LOCATION

ITEM

ACTION

REMARKS

Upper Receiver and Barrel Assembly

All items

Inspect bore for dirt and rust. Inspect bore for ringing.

Inspect chamber for pitting

Replace authorized unservice cible parts.

Definitely ringed bores or bores ringed sufficiently to bulge the outside surface of the barrel are causes for rejection.

Lands that appear dark due to coating of gilding metal from projectiles are allowable.

Si. ipping of lands and grooves shall not be cause for rejection unless so determined by barrel erosion gage.

Fine pits, or fine pits in a densely pitted area, are allowable. Pits 1/8 inch in length are cause for rejection.

Upper Receiver and Barrel Assembly

All items

Cover with a light coat of CLP (item 5, app D).

Upper Receiver and Barrel Assembly a. Sling swivel (1) and tubular rivet (2)

If previously disassembled, position sling swivel and install new tubular rivet using center punch and hammer to spread and flare the hollow head of tubula. rivet.

Glock Exploded View
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