No need of vise for front sights - they screw in with very little play. Use tad amount of loctite or fingernail polish to set screw and eyeball. Have done this (Ameriglo sights) on 17, 19, and 22 without a problem. Have used pusher and vise for rear. Both results were fine, but cannot see doing installation without a vise of some sort if not using a pusher. Either way, eye balling was used exclusively.