Gunner Field Blind - Full Framed The new GUNNER field blind offers all of the premium features that you have come to expect from Beavertail, with the added benefit of an assisted lift backrest, and easy slide locking fold up/down modularity. The patent pending spring-loaded backrest features a spring loaded base that assists as you move up or down, so you can concentrate on lining up the shot and less on getting into position when its "go" time. Available in Mosey Oak Shadow Grass.