Accurate, simple, bullet-proof!. The Primos® Bombshell® is the result of 3 years of prototyping, test and tweaking, in order to bring turkey hunters the excellent sounding, most versatile, simple to use turkey call we could make!. Simply push the rail to automatically yelp, tap the rail to cut and slowly press the rail to purr or whine. The Bombshell® rail can be adjusted to tune the call for higher or raspier pitch. It can also be locked for quiet carry. In addition to all of this, the Bombshell® is designed to be mounted to your shotgun so you can call with very little motion to bring that gobbler in close!.