(1) _Fuel hose_, which conveys fuel from the tank group to the gun. The fuel hose may be requisitioned as hose, fuel, portable flame thrower, M1, assembly B81-1-498. (2) _Gun_, which ignites the fuel and directs it to the target. The gun may be identified as gun, portable flame thrower, M2, assembly D81-1-405. It consists of: (_a_) _Fuel valve_, which discharges fuel through the barrel. The valve is operated by squeezing the valve lever and the grip safety, which are on opposite sides of the valve grip. The valve also includes a barrel from which the fuel is ejected. The ignition head is supported on the front of the barrel. (_b_) _Ignition head_, which ignites the fuel as it passes from the nozzle of the barrel. With each pull of the trigger on the front grip, one of five charges of incendiary mix in an ignition cylinder is ignited. This pilot flame ignites the fuel as it is propelled from the gun. [Illustration: Fig 5. Tank group with carrier folded back to show construction.] [Illustration: Fig 6. Gun group of portable flame thrower M2-2.] 6. IDENTIFICATION INFORMATION. The words “Chemical Warfare Service,” model numbers, serial numbers, lot numbers, weight, cubage, manufacturers’ names, contract number, and date of packing are indicated on the packing chest or the equipment. The numbers and letters shown on the equipment should be referred to when repairs are required. The tank group and the gun (without the fuel hose) may each be marked “M2” and the fuel hose may be marked “M1,” although all of these are components of the M2-2 portable flame thrower. 7. DIFFERENCES IN MODELS. _a. M2-2 and E3 portable flame throwers._ Portable flame thrower M2-2 is identical in all important respects with portable flame thrower E3. (The E3 flame thrower, when standardized with some modifications, became the M2-2.) Operation and maintenance of the M2-2 and E3 are in general the same, and the parts are interchangeable. _b. M2-2, M1, and M1A1 portable flame throwers._ Portable flame thrower M2-2 has the same fuel capacity but differs in construction from portable flame throwers M1 and M1A1. Parts are not interchangeable except as stated in Paragraph 8. 8. INTERCHANGING PARTS WITH M1 OR M1A1 FLAME THROWER. To use an M2-2 gun with tank group (fuel unit) of an M1 or M1A1 portable flame thrower: _a._ Remove fuel hose from M2-2 gun. _b._ Screw a 3/4-inch by 1/2-inch pipe bushing into the side opening of the fuel-valve body. This bushing is furnished in the spare parts kit of each M2-2 portable flame thrower. (Par 10) _c._ Screw the fuel-hose assembly of the M1 or M1A1 flame thrower into the 1/2-inch opening of the bushing, using a wrench to make a tight connection. 9. DATA. All data are approximate. _a. Range._ See Paragraph 22. _b. Duration of fire._ (1) _Fuel_. (_a_) Continuous discharge of approximately 8 to 9 seconds, or (_b_) Several short bursts totalling approximately 8 to 9 seconds (not including time between bursts).