The sig mosquito is not worth the money. From the gunsmiths I have talked with, it seems they have created a pistol with too small a tolerance. Thus, allowing only the high quality target ammo to chamber.
The Sig .22lr Classic is fantastic. No the slide does not lock back, but it functions very well. Put high end ammo in it, you will almost never have a jam. Putting mid-grade stuff, ie. remington thunderbolt it was 99% success after 1000 rounds. Probably bad ammo though.
I did put some crap 500 pack ammo into it. It didnt like it at all. Had feeding and chambering problems about 80% fired, 20% didnt. I'd say partly due to ammo. But this pistol doesnt seem to eat it all. Mid-high end ammo. ie. 28-35 for 500, no 20-25 dollar deal ammo.
Questar has the cheapest price for sigs around $670 - and if you buy a new Classic right now they have a coupon for a 400 dollar caliber upgrade, so for 1100 you can get a sig 226 with .22lr and 9m/40/.357 sig. Not a bad deal.
Buckmarks, Mark II or Mark III, you hear a lot of good about them, and a lot of people use them. but Im not a fan. They last for ever, they work well, but I dont like a few things about them.
One, they suck to take down and cleaning. I want to be able to show a novice how to take down a pistol quick and easy.
Two, they have no rails and are an out of date design.
They do have use and some good qualities, so give them a look if you can.
The first .22lr I ever bought was a Beretta Neos U22.
wholesale sports online sells for $415 - cheap!
I can take it down and have it FULLY FIELD STRIPPED in under 10 seconds...yes please!
I once again use Remington Thunderbolt with this pistol...over 7000 rounds - NO MISFIRES.
It has a rail system that allows you to mount a scope...you can change in and out barrels very easily for different sizes.
It is great for med-large hands - not small.
Has a different mag release - not good for practical training tool.
I hope that helped...
Drop me a line if you have any other questions.
Make sure you hunt online for the best prices!