Haha. Yeah, in CA even most LEO's you can't get the cool shit. To get a non-neutered AR15 you need a letter from your Chief of Police for purchase. The letter is by brand, model, and serial number too. Unless you work at a cool department or are buddy buddy with the chief you usually don't get a letter, much less a letter for other non-neutered rifles like AK's, FAL's, HK G3's and the like.
As far as checking stuff out to play with, unless your a SWAT guy who takes home their rifle you probably don't get a take home rifle or suppressor. None of our SWAT guns are full auto.
About the only thing LEO gets you in CA is carry privileges, any handgun you want, and no magazine limits. Other than that you get screwed just like everyone else. Only cool stuff I have is a SIG P220 Carry Elite (its not on the CA approved list of handguns) and 20 round mags for my M1A.
Which is why, 20 years from now when I retire, I'm moving to a free state and buying a load of toys.