i've had several glocks & LOVE the "mini glocks" the best

every one i owned have had the pinky rest mag extension you have...you might want to invest in the extended mag release & extended slide release. they both make it easier to do the required task

http://www.ccwsupply.biz/GlockMagsandPartsPAGE.htm

http://www.allglock.com/Items-170-1-extcontrols.aspx

they also make an extended frame break-down release, but i found with practice, the stock ones are just fine for as little as i broke mine down