Aaron has posted his monthly compendium of contests with guns and other stuff as prizes.
In the handgun category, you find one each of a Glock 34, 35, and 42. There is the CZ Evo Scorpion and a nice custom 1911 among a few other handguns.
The rifle category has a slew of ARs plus an Accuracy Internation AW Sniper Rifle. I’m sure the gun prohibitionists will try to make something out of that. The only shotgun is a Browning Citori.
Finally, in the accessories category, you’ll find everything from a SilencerCo Salvo suppressor to a Chevy pickup truck.
If you come across any other contests giving away guns, let Aaron know on his webpage.