Since no one else will say it, I guess I will. The Ruger grip angle is unique which is a hallmark or a stain depending on if it works for you. The Sig mosquito has a zinc alloy frame, I'm sure it's safe and it'll work I would however be concerned should it ever fall on a rock... My personal opinion on the aftermarket stuff for Rugers is that it's because Ruger simply won't offer modifications or improvements to it's design (plus if you install any aftermarket stuff on your gun, you'll void the warranty). I own a Buckmark and I will agree that the trigger is great and that the accuracy is better that many other options. However I would be remiss not to mention that they use two screws on the top of the action that holds the whole shebang together. I have found that gettting the gun to stay together for more than 500 consecutive rounds requires tightening of the screws. I am not fond of designs that require screws to be removed for takedown. That being said, there simply aren't many .22LR designs that don't have this problem. So I went looking for a replacement and I think I've found it. I'm planning on obtaining a Beretta 87 Target. The screws holding the counterweight on are the only ones required for takedown. This is less objectionable given that the firearm will operate without the weights, whereas the rear sight, as well as the top half of the action on the Buckmark is held together with it's screws. One other point is that the sight radius will have a considerable effect on your accuracy. After owning two Buckmarks, one with a 6" barrel, and one with a 4" barrel, I'd never buy a 4" again. The precision afforded is well worth the extra price.