referring now to the drawings , a weapon simulator system 10 is illustrated which simulates the u . s . army m134 weapon , e . g . a six - barrel , 7 . 62 × 51 millimeter nato round gatling - type machine gun . the system 10 comprises a housing 12 which mounts a drive motor 14 coupled to a barrel assembly 16 . preferably , the barrel assembly 16 includes six individual barrels 18 which may be of different length . a feeder de - linker module 20 is mounted to the housing 12 which operates to feed rounds of ammunition ( not shown ) through the system 10 . the housing 12 may be connected to a vertical mount assembly 22 having a pitch angle sensor / encoder 24 and an azimuth angle sensor / encoder 26 . the assembly 22 may be supported by structure ( not shown ) of a helicopter gunship , ground vehicle , armed patrol boat or fixed wing aircraft . a spade grip 28 is mounted at the rear of the housing 12 , opposite the barrel assembly 16 , and is coupled to the drive motor 14 . the spade grip 28 includes grip arms 30 , 32 connected between a bottom plate 34 and a top plate 36 which houses a vibration device 38 which may take the form of a voice coil . a fire panel 40 is mounted to the top plate 36 which supports a low rate trigger 42 , a safety off / enable / arming switch 44 , an armed light indicator 46 , a high rate trigger 48 and a push to talk button 50 . with the switch 44 in an armed position , depression of either of the triggers 42 , 48 causes the drive motor 14 to rotate the barrel assembly 16 . the rate of rotation of the barrel assembly 16 depends on which trigger 42 , 48 is depressed , i . e . at a low rate of 2 , 000 rpm or a high rate of 4 , 000 rpm . the simulator 10 of this invention is capable of simulating weapon malfunctions , including jammed rounds , misfires and round cook - offs . in order to simulate a jammed round , a dented round ( not shown ) is fed into the feeder de - linker 20 . the round may be dented prior to placement in a belt received by the feeder de - linker , or a round denting device may be employed in the simulator 10 such as a solenoid - operated hammer or an electric motor with a cam which forms a dent in the casing of the round prior to introduction into the feeder de - linker . while the invention has been described with reference to a preferred embodiment , it should be understood by those skilled in the art that various changes may be made and equivalents substituted for elements thereof without departing from the scope of the invention . in addition , many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof . therefore , it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention , but that the invention will include all embodiments falling within the scope of the appended claims .