groove 54 in a post 56 of yoke 18 that inserts into a hole 58 of body 16 shown in fig6 and 8 the connection is maintained tight enough by e clip 52 so that yoke 18 will not wobble or vibrate but is flexible enough to allow yoke 18 to pivot in relation to body 16 pivoting allows a gunner to rotate the barrel of a gun through a small angle in a plane lying perpendicular to a line bisecting the splayed legs 12 14 so that the gun carried in yoke 18 has a field of fire the pivot angle is defined by ledges 64 on body 16 fig5 that limit the rotation of yoke 18 about post 56 fig6 referring in particular to fig2 and 7 in the preferred embodiment body 16 is essentially a hollow cylinder open at both ends and having cutout portions 72 74 for receiving the tops 78 80 of legs 12 14 respectively when legs 12 14 are splayed legs 12 14 are held securely to body 16 by a tie member 82 that is received within body 16 but which extends far enough beyond the ends of body 16 to allow it to be inserted into slots 84 86 formed in tops 78 80 of legs 12 14 where it is secured with pins 88 90 inside body 16 is a compression spring 92 that encircles tie member 82 and is flanked by two plungers 94 see fig2 and fig7 each of which is a hollow cylinder and has a cutout portion 96 for receiving tops 78 80 compression spring 92 resists the movement of plungers 94 toward each other and urges plungers 94 axially outward of body 16 each plunger 94 is retained inside body 16 by pins.