Are you lookin for extended slide lock so you can more easily drop the slide by merely thumbin the lock down ?
If so, that is really rough on the notch in the slide, especially with a stainless (softer) slide. Eventually the crisp notch will have rounded corners and then come the failures to lock open when empty.
Proper way to release slide is to pull it back, thumb the latch down, and then release the slide. May not look as sexy but your weapon will appreciate the care.
Sam