left side: PSG-1, G3, the rifle variant of the MP5 (I think it's called G35 or something), another G3, MP5K, MP5 variants, even more ridiculously tacticool MP variants, the GMG
right side: G11 + variants, the SL8 was it called?, UMP, 3 variants, G36 + variants, XM-8 + variants and I assume the HK416 or 417
No clue what their handguns are called. I do spot a HK USP Match on the right side between the XM8 and HK416/7 though.