For single stack pistols:
I don't think anyone makes a double stack?!?
The first kind is the most common. It basically holds down the top round so you can fit in another. While it saves your thumbs, it doesn't do a thing for loading mags faster. Several companies make basically the same device for every mag/gun combo. They are everywhere so I'm not going to post a picture. I've even gotten them as freebee/swag/handouts.
AMAZON Crabtree-RUGER-22-CLIP-LOADER $8.99 w/PRIME
The makers of the oh so popular LULA loader have one that works for .22s the BabyUpLULA. I have yet to use one so will pass commenting. I DO have it's bigger brother and I am definitely a fan.
Amazon $29.65 W/PRIME
McFadden makes the "Ultimate Clip Loader" You put your mag in and shake a bit and it loads rounds from a tray like the ButlerCreek model below. I also have one of these. Somehow I'm having trouble loading the 10th round. About half the time it doesn't load properly Probably I'm doing something wrong....
If you have a 10/22 you have two options.
Champion makes a loader that you fit your mag in and you press a button repeatedly and load rounds. Again I have not tried this device yet.
**need to find a link**
Butler Creek makes a crank loader primarily for their hotlips line of magazines. I do own one and it makes reloading magazines MUCH easier! You just turn a wheel and it loads with a click. The tray holds about 50 loose rounds so can load two 25rd mags before having to reach for more .22.
AMAZON $24.49 W/PRIME
Dear FCC I paid for the items I own with my own money. Images are form Amazon.com and are used with links provided. I might swap the links for affiliate ones later.You are emitting co2 which is harmful to the environment and is known by the state of California to cause cancer. I suggest you stop that immediately