Glock 21 for dedicated home defense
thats a snappy gun for a lady even a manwe keep handguns in the nightstands next to the bed, on her side is a glock 27, my side has a 1911 45acp.
winchester 1300 defender isnt far away..
downstairs i keep a remington 870 available.
thats a snappy gun for a lady even a man
thats a snappy gun, even for a lady-man
I'd venture to say that since February of 2016, the OP has probably solved his problem?Since you say you're "very new to owning firearms" and you already have a pistol for CCW and an AR for HD, I suggest buying training before getting another handgun.
But since you asked, I would get a glock 19 before a 17 because the 19 is a solid choice for either CCW or HD--and you can reload with glock 17 mags too. Having said that, I wouldn't suggest being limited to glocks. There are other pistols with very similar controls that might have better ergonomics etc for you.
Use the AR15, pistols are for backup or when you don't have the luxury of using a larger firearm. With XM193 ammunition, it's not going to overpenetrate any more than a 9mm handgun will.
I know it's not the answer you want, but it's the honest truth.
It's hard to argue with the logic behind a Glock 21 as an HD gun. It is simple in operation, can mount a light and holds 14 big, fat, slow, rounds that are less prone to over penetration that a hot 9mm, .40 or 10mm round might be. That said, my current HD gun is a 17+1 .40. The main reason I like the CZ P09 over the Glock is that the DA pull on the CZ is a bit longer and smoother than the tuned pull on my G21. That's not much of a reason though.