Hi everyone, newbie here. I was wondering if grip unit from G36:

G36 grip unit compatible with HK243S SAR?-1659.jpg

Would fit into 243S SAR (aka civilian G36) with the gun still being functional?

G36 grip unit compatible with HK243S SAR?-hk243.jpg

I noticed the position of switches are different on both guns, hence my doubts.
Also, a 30 round magazine from G36 should fit into 243S (it comes with 10 round mag), or am I wrong?

Appreciate your opinions!