Got a question for ya "Sarge", are the 20's a bit bulky,they look it. I was thinking the 15's might be better as there not going to be so long. The 20's look like they wouldn't work real well from a rest? They are a bit spendy off there site so I'll have to see if I can find them a bit cheaper than $50, ouch!! But they work real well though? I need 3-4 but I'd hate to spend that much and find out there not that good. I haven't had any trouble with the factory plastic mags, but I do like steel mags much better.