Keith, hold the sight down and pull out on the little piece with the hook end, the sight then should move to the upright position under spring power. In the upright position you should be able to push the sight forward or back and it sh0ould spring back to the upright position. The 'should' 's are used because these are often found with the spring unwound and out of position. Yours looks to be siting really low so there might be a problem with the spring, because of the spring there usually is a little more clearance showing in the folded position.