I've been shooting both of these on a regular basis. It's just a matter of holding the red dot over the bullseye! The top one is a Marvel Unit#1 steel slide lock-back with a Vortex Venom 3moa reflex red dot mounted on a 2014 Colt Combat Elite XSE lower. Grips are RoCo "The Master". The bottom is a older Marvel Unit#1 aluminum slide non lock-back with a older 1" Ultradot 4moa red dot mounted on a worked over Norinco M1911-A1 lower. Grips are also by RoCo. It's fun shooting these.