Gun Compact Scope

i wanted to know if this rail will still work with my gun http://www.airsplat.com/Items/AC-MNT-CA-A079M.htm
this is for the g3a3 but it look slike it would still work and this is the one that it says it suposed to have http://www.airsplat.com/Items/AC-MNT-P668.htm now i know i should probably go with the second one but i wanted to know what would be better if the first mount will even work. and im going to be putin a scope with 1" reaver rings and a NC star 4-6X28 compact scope please if you know that one of these things wont work on my gun or if i have to change somthing plz tell me! cuz im new to scopes and rings and every thing else thank you for taking the time and read all of this !
this is the JG G3 SG1