I have been looking at the GSSF rules on their website. I am confused what can be done to the Glock in stock division. In one place it says that anything that has been available from glock is legal. Then right under that it says extended slide stops and connectors are illegal. Isnt the extended slide stop and 3.5 connector available from Glock? Does this just mean that both parts must be Glock with Glock part numbers? Also is there a preferred sight for GSSF? I think I like the TFO's. Is there a standard package thats used in stock such as connector and slide stop? I would like to go try this but do not want to show up with my Glock and because it has an extended slide stop and 3.5 connector have to shoot a higher division on my first try. Thanks for any positive help.