I personally don't like the pressure switchs. Several reasons:
1) its something else to go wrong, get hung up, or break
2) we've had several students in high volume of fire drills melt their wires/switches... when they are poorly mounted.
3) In the cold or with gloves, you may not hit the switch, or may inadvertently hit the switch when you do or don't mean to.
You will always be able to hit the switch with your thumb. ITs positive and it works. Keep it simple and straightforward is my preference.
Damien in Seattle
I don't list my guns - I know glocks, FALs, and AKs but I'm not sure my ability to fill a gunsafe with guns make me an expert on anything.
All that you can depend on from a 45 is that it will drill a .45 - .70 inch hole about 14 inches into someone. There will not be "energy dump", people will not fly backwards, and they will not necessarily fall as if they have been struck by lighting.