shooter problem (mirror,gun pin,angle limit)

so im making a shooter platformer game and i have 3 problems..

the first is: i want to make my sprite mirrored when the mouse pointer goes behind him

second: i want to limit the aiming angle /not 360

third: every time i pin another gun that is not already pinned when the layout start it doesnt follow the mouse angle,it doesn't completely move D:

ps.in a similar topic (named Problem with Platformer aiming toward mouse angle)a user asked question similar to mine but the anwser didn't suit for my case,

if you want i can write all the event sheet here if it helps you find an answer for my problem...right now i cannot post images so that's the only way...

thanks a lot for helping me :) you guys are great ;)

for your first question:

system compare two values: mouse.x < player.x - player set mirrored.

else: player set not mirrored.

1+2 with mirroring the shooting angle as well:

666kb.com/i/cijnq0pwvv0d2pgfh.gif

in this example the weapon could only face upwards, but setting up the instance variables can change it to any range (small forward cone etc)

3: not sure without seeing the capx, workaround could be moving and rotating it with events (e.g. at each tick - set position to player (or a thing attached to him) and set angle to player.fireangle)

thank you guys^^ ;))