I bought my G20 Gen4 off of GunBroker and it was a 10rd model. I didn't really like that, but on the other hand, in my state if you hunt your gun can't hold more than 10rds in the magazine. So....I kept one 10rd mag, sold the other two online to people and took that money and bought two new 15rd mags. Worked out great.
Glocks and Single Actions