58. Hand Projector Mk 4 is for use with Signal Light Mk 2 when no Signal Pistol is availab-le, or when the signal lights are used with the "Abandon Ship" signal kit shown in Fig. 16. It is entirely of metal and consist of a barrel, three inches long, which fits by bayonet plug projection into a breech lock and breech-lock cap, both of which are part of the breech mechanism. See Fig. 25. The projector, when fully assembled, is 5.6 inches long. Within the breech lock is the firing-pin seat, which rests on a spring washer and extends through the breech-lock cap to the firing-pin-barrel cap. A safety chain is attached to the barrel, and a safety-chain ring fits in a groove on the extension of the firing-pin seat to hold it tight against the spring washer on which the firing-pin seat rests. Within the firing-pin seat extension is the firing-pin spring, and within that spring is the firing pin. At the extreme base is a safety lever which holds the hand-operating knob away from the firing-pin-barrel cap when the safety position.

Figure 25. – Hand Projectors Mk 3 (Left) and Mk 4 (Right)

Operation

59. To load Hand Projector Hand Mk 4, twist the assembly until the barrel pulls out from the breech-lock cap and insert the Signal Light Mk 2 (see Fig. 26) before reassembling. Be sure the safery lever is in the safety position. The swing the safety lever to the firing position and fire as shown in Fig. 27. Another method of firing is to hold the projector firmly in the left hand as shown in Fig. 28, and strike sharply with the heel of the right hand, making certain that the barrel of the projector is trained to a safe area. To remove the empty cartridge after the signal has been fired, twist out the barrel and, with the safety lever of safety, insert the breech mechanism into the muzzle, forcing out the empty shell. See Fig. 29.

Figure 26. – Loading Hand Projector Mk 4 Mod 0

Figure 27. – One Method of Firing Hand Projector Mk 4 Mod 0

Figure 28. – Alternate Method of Firing Hand Projector Mk 4 Mod 0

Figure 29. – Ejecting Expended Shell

Alternate Projector

60. In some "Abandon Ship" signal kits Hand Projector Mk 3 is provided. This firing device is shown in Fig. 25. Its use and operation are practically identical to those of Hand Pro-jector Mk 4, except that Hand Projcetor Mk 3 has a screw connection between the breech and the barrel, and the safety device is in the form of a spring pin.

Safety Precautions

61. No ammunition other than that authorized should never be fired from hand projectors. The general rules for safety in operation of small arms must also be used when operating them.