a. General. This inspection is conducted on materiel in alerted units scheduled for overseas duty to be sure that such materiel will not become unserviceable in a relatively short time. It prescribes a higher percentage of remaining usable life in serviceable materiel to meet a specific need beyond minimum serviceability.
b. Preinspection Points.
Clear the weapon before starting inspection. Do not squeeze the trigger until the weapon has been cleared. Inspect the bore and chamber to be sure they are empty and free from obstructions.
(1) Before inspection, clean the grenade launcher thoroughly of all grease, dirt, or other foreign matter that might keep it from functioning properly or get in the way of gages and tools during inspection.
(2) Grenade launchers must be free of burrs, rust, or corrosion on functional surfaces.
(3) Parts must not be cracked, bent, distorted, or damaged and must not be excessively worn or loose.
(4) Minor defects in metal components do not normally affect their acceptability. For example, scratches and tool marks are ordinarily of no importance.
(5) Inspect finish of metal surfaces. Satisfactory metal surfaces for weapons range from black to light gray. A shiny metal surface is objectionable only when it is capable of reflecting light. No weapon will be rejected unless exterior parts have a shine.
c. Inspection Points.
(1) Springs must not be distorted or broken. Springs must have enough tension to perform their function.
(2) Inspect the barrel for the following:
(a) Barrel must be clean and free of corrosion caused by moisture and powder fouling. | (b) Barrel must pass bore constriction check (p 3-13).
(c) Pits in the chamber are allowable if they do not get in the way of extraction.
(d) Scattered or uniformly fine pits, or fine pits in a densely pitted area, are allowable.
(e) Tool marks are acceptable, regardless of length. They may appear as lines running along the grooves or spiraling across the tops of lands.
(3) The sear and cocking notches must be in good condition. Chipped engaging corners will be cause for rejection. Slight wear on functional surfaces, including engaging corners, shall be acceptable, providing the minimum trigger pull requirements are met.
(4) Chips, flat spots, or bent striker points on firing pin will be cause for rejection.
(5) The cartridge engaging surfaces on extractors must not be chipped or deformed.
(6) Safety must positively position in both SAFE and FIRE positions. When in the SAFE position, the weapon must not fire when the trigger is squeezed; when in the FIRE position, the weapon must fire when the trigger is squeezed.
(7) Each weapon must be hand-functioned to check for unusual binding, positive cocking action, and general operation. Dummy ammunition must be used to be sure of positive chambering, extraction, and ejection action. Dummy rounds can be acquired through local TAS-C. |
(8) Rivets and spring pins must be tight.
(9) All markings must be legible.
d. Specific Standards. Refer to the following table:
STANDARDS FOR PREEMBARKATION INSPECTION OF 40MM GRENADE LAUNCHER M203 IN UNITS ALERTED FOR OVERSEAS MOVEMENT
Hand guard assembly Barrel assembly
Receiver assembly Trigger pull
Clear grenade launcher of any ammunition and inspect in accordance with para 3-11. Grenade launcher must pass all testing in paragraph 3-10.
Hand guard assembly must not be damaged so as to prevent positive retention to M16 series rifles.
Origin of rifling must not advance to a point more than 3.9 inches (9.91 cm) from breech end of barrel assembly. Barrel assembly must pass bore constriction check as cited on page 3-13. Cartridge locator must function properly under spring tension.
Trigger and sear must not have rounded or damaged surfaces.
Minimum 5 pounds (2.27 kg). Maximum 11 pounds (4.99 kg). Use trigger pull measuring fixture as cited on page 3-34.
ARMY TM 9-1010-221-23&P AIR FORCE TO 11W3-9-4-2 MARINE CORPS TM 07700A-23&P/2 NAVY SW 370-AE-MMI-010
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