The Last Dry Fire Guide You'll Ever Need | JJ Racaza Master Class 

Yes it does

It needs to be within a few feet but yes

@@shootersglobalis this all timers? Also what shot timer is this he is using

It can get from Warsaw to Leipzig in less than 2 hours but it takes two and a half days to get from the city I live in to somewhere else, also in the city I live in.

You don't

you can buy dryfire magazines for the glock.

I just got my "dryfire mag" today for my Glock, works great, the trigger pull is very similar to the factory one without the mag.

The application is called - Drills For Android - play.google.com/store/apps/details?id=udtech.drills&hl=en For IOS - apps.apple.com/us/app/drills-shooting-training-app/id1202856977

Efficiency for consistency