We recently wrote about The Citizens Armory and their low shipping costs for small parts for the AR-15. Now they have lowered the shipping prices even further (as low as $.70) on the smallest parts and have listed a selection of Glock small parts. Their prices are very decent as well. For instance, they are selling Glock 19 magazines for $20 right now plus their low shipping rates.
Thanks to Vuurwapen Blog for the heads up.