What Q uses most of the time would probably be the Remington SPS Tactical, simply because it's cheap, fairly comfortable and easy to use.

The FR F1 is what Q trained with and brought over from France. He used it when he was starting out but quickly ditched it once he could afford to in favor of other weapons. While he does have a soft spot for the F1 he would rather not bet his life on it.

The Dakota T-76 Longbow is a rifle on Q's "Do want" list. One of these days he'll upgrade. One day.

However, Q's dream rifle is a fully custom Winchester classic sharpshooter. If he dies, he wants to be buried with it. If he ever becomes rich, he wants this gun to have his babies. He'll probably never get his hands on one. He has never even thought about what type of features he wants on it. Well... He has, he just... Can't seem to narrow the awesome down to just one gun.

Handguns
Q's not big into handguns. He carries around one with a knife just for added protection. He doesn't really like using them, but sometimes, you just have to. It's a man eat man world out there, after all.

On Q's to-buy list is the Browning HP Mark III. However, in the meantime, he's been stuck with the Glock 17.
Glocks are fine and easy to get a hold of... He'd just prefer to have a Browning.

Q's more interested in upgrading his rifles though, so he'll probably never get around to buying a new semi.

Knife
Q carries around a handgun and a knife for protection. The knife hardly ever gets used, as Q prefers guns.
However, Q only wanted to buy one knife and never have to worry about it again. After all, if everything else failed, he'd have to depend on this one knife. So he uses the SOG Pentagon.