two Q's about this glock mag

[G38xOC]

top pic is mine . I just want to know if will this mag work on gen 4 glock if I switch the magazine release for left handed .

also , can someone tell about the difference notch on the wall being block and cut out open ?

[vintagearms]

Yes, it will work for Gen 4.

http://cdn2.bigcommerce.com/server500/77936/product_images/uploaded_images/glock-mag-generations.jpg?t=1421695727

[G38xOC]

thank you . should I be worried about ambi mag catch area being covered , instead of being cut out open ?

[email]

Only the picatinny rail 21 used that flapper mag release that I'm aware of. Gen 4s use the two side cuts.

[G38xOC]

interesting . something I never heard of . I guess its something irrelevant . my main Q is answered . thanks guys !