R to eject or load a magazine, pull the slide back to chamber a round and space to fire, 1 for 12 ammo and 2 for 100 ammo.
(In the original remix I accidentally deleted the slide so here we are again.) This is all made by @kajus12345lt all I did was add sounds from my gun with no trigger game (which was recorded from a g17) and make it look like a Glok. The creator of the original really impressed me with all the work he put into this.