Let me add a few on there pardner:
13. You can trade in the old handgun you've had for years for a new one & it will be worth more than you spent on it.
14. You can lock up your handgun in the dark until you're ready to use it again.
15. You don't have to feed your handgun until you're ready to shoot it.
16. If you don't like how much noise it makes you can feed it reduced loads or wear ear plugs w/out objections.
17. Your handgun doesn't snore @ night.
18. You can shoot your handgun w/ out it shooting back.