It might even help to keep my fingers from getting pinched.
Holding the gun in my right hand, I close it using my left hand.
I put my thumb and fore-finger over the scope and on the gun on each side of the rear sight.
I don't put any pressure on the scope, since it's mounted on a soft plastic rail, any pressure
will deform the rail quickly. When you install your mounts, don't put them on real tight like on a steel pistol 
Mine are not so loose they will move around. But, just enough to do the job.
Rich