1911, Glock, Shotgun, and revolver models available:
Your landlord might not like these, but do you care? (hmmm yea I guess you probably do care…) The shotgun and revolver one might fly under the radar, but I doubt the 1911 or the Glock would.
An example of the Glock one installed:
I’m more of a fan of reverse peepholes, because as suggested on Seinfeld it can really give you piece of mind in avoiding an ambush when coming home. :P For that reason, you could always mount one of these on the inside of your apartment instead, and faux-muzzle sweep yourself all day long.
GG&G has them for $18 each if you’re interested.
Hat tip: Sarah