TM-5-5420-202-10

SERVICE

Introduction

WARNING

•Am

isf re or dud has the potential to explode. DO NOT touch a dud smoke grenade. When

isf re or dud occurs, all personnel must remain a minimum of 219 yd (200 m) from

vehicle for a minimum of 5 minutes after f

al attempt to f re. Crew must remain in vehicle

with hatches closed. Notify Explosive Ordnance Disposal (EOD) personnel and give type,

quantity, and precise location of dud grenades. Failure to comply may result in personnel

injury or death.

• An explosion may occur if discharger or grenade contains sand, mud, moisture, frost, snow,

ice, grease, or other foreign matter. Before loading grenade into the discharger, ensure

each part is free of sand, mud, moisture, frost, snow, ice, grease, or other foreign matter.

Failure to comply may result in personnel injury or death.

1. United Kingdom (UK) L8A1 RP (red phosphorous) screening smoke grenades are used with the M239 grenade

launcher. They are f lled with a red phosphorous and butyl rubber mix (Figure 1, Item 2). Each grenade is

approximately 2.61 inches (6. 6 cm) in diameter, 7.28 inches (18.5 cm) long, and weighs approximately

.5lb(0

.68kg

)

2. A grenade is propelled from the discharger when electrical current at the f ring contact (Figure 1, Item 5) ignites

the fuse (Figure 1, Item 4). The fuse ignites the propellant charge (Figure 1, Item 6) and a delay composition

within the delay holder (Figure 1, Item 7) and, in turn, the gunpowder and bursting charge (Figure 1, Item 3).

This bursts the rubber case (Figure 1, Item 1) and ignites the red phosphorous/butyl rubber composition

(Figure 1, Item 2) to produce an immediate smoke cloud.

0075-2

Figure 1.

Smoke Grenade.

END OF TASK

0075

TM 5-5420-202-10

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