Off the Shelf
Defiance Ex-Shocker, no license required.
Ares Predator IV, good solid staple
Morrissey Élan, broken. Made entirely out of forbidden parts, it's just restricted
Streetline Special. 100

If you're going in to rescue hostages, and you want to arm them, buy these in bulk.
Ingram Smartgun X, broken, comes with a good selection of mods including forbidden mods in a restricted gun.
Ares Alpha, again, a good solid staple.
Predator XXL, When you care enough to kill everyone involved.
Mods:
Airburst Link on the Ares Alpha
Any of the mods on "Honey" (below)
Excessively Modified.
HK-227X ("Honey") 5P - SA/BF/FA 6(7) 28© SR4 318
Concealable Holster, Gas-Vent 3 System, Quick-Draw Holster, Spare Clips, Spare Clips, Stock, Underbarrel Weight, Additional Clip, Camera Upgrade, Thermographic, Camera Upgrade, Vision Magnification, Personalized Grip, Skinlink, Sling, Smartgun System, Sound Suppressor
Note on Smartguns:
For whatever reason, glasses, binoculars, goggles, scopes, etc don't have a recording feature and can't get one. Cybereyes do. Cameras do. You can get a recorder implanted in your skull. However, the Smartgun System contains a camera. The upside of this is that you can get some useful camera upgrades for doing recon and the gun records your killing of people you've been hired to kill. The downside of this means you actually have to point your gun at whatever you're reconning and the gun records your killing of people you haven't been hired to kill. Anyone wanting to arguing recording with a smartgun, feel free to start a new thread and point to it.
Additional Clip: Personally, I like my clips to be one lethal, one non-lethal. I'm not sure why it isn't standard for law enforcement.
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QUOTE (Marwynn @ Aug 11 2011, 10:01 PM)

If it's a Smartgun, get Skinlink so you're not broadcasting your gun's presence. Hackers can eject said gun's clips afterall.
People keep saying that. I don't see it as reasonable.
1) They can do so if they've hacked the master that gun is slaved to. At this point someone's PAN is compromised or, worse, that PAN is slaved to a compromised Tacnet.
or
2) If they want to hack or spoof (at -6 admin) then they need to get the access_ID, which should only be available from #1 (above), or scan hidden (up close and personal). There is no reason the access_ID should be published or the gun should be running in active or passive mode.
Meanwhile, restricting your gun to skinlink means that every time you check in your gun at a bar it's out of your control. If you leave the wireless on, you can look through the smartgun camera and notice anyone attempting to remove/replace clips, turn it off, etc.
Both have their risks, but skinlink isn't the clear advantage people claim.