you can still find used grendel pistols. they are a plastic framed semi auto in 22 mag with a 30 round mag. despite all those shots, its still a pretty small package. guys on my action pistol league back in the day, would shoot them in minor class. and i remember them being pretty reliable, and fairly accurate. i have seen the chopped down versions of the 10-22 and they are much bigger and blockier than the grendle. and the same goes for the calico, which i think holds 50 or 100 rounds. good luck