i picked up a GP100 several years ago and fell in love with the gun.
really liked the size of the gun and the fit and finish of it.
couple years after i decided i wanted the same gun but in a 22 and i wanted basically my GP100 in a 22 if i could find it.
unfortunately they did not have the GP100-22 out but i was lucky and the SP101-22 had just come out, so i picked up one of those when my local gun pusher for his first one in.
i was VERY surprised when i got the SP101-22 to find that it was smaller then the GP100.
upon doing some research i found out that the SP line is the carry line for Ruger hence the smaller size gun.
probably should have done my research BEFORE buying, haha!
anyways, when the GP100-22 came out last year i had to really sit back and think if i wanted to sell off my SP and get one of those instead.
then i saw the price!!!!
ive since decided to stick with my SP.
i did have to swap out the springs on my SP because it was KILLING my thumb.
that was just a brutally hard gun (for me) to shoot how it came stock.
i didnt have the will power to sit around and dry fire it 1000 times.
$5 worth of springs and im happy.
the SP really is a very sweet gun to shoot once you get it to the range.
the fiber optic front site is nice and the gun is smooth like butter.
here are some pics i took back when i got my SP comparing it to my GP for size.
hope that info helps ya!
oh, and i did look at the Alpha's when i was looking to pick up a 22 and i didnt like them, my gun contact (seller) has even stopped carrying them which says a lot to me, granted i havnt asked him why he dosnt carry them anymore, so i just of course assume the worst.