That's an East-German ak. I didnt find a list with exact models and their differences. But 'MPi-KMS-72' seems to bring up this kind of rifle.
https://www.deviantart.com/firearmsanddevices/art/MPi-KMS-72-1-55167195 vs this article:
ruotuvaki.fi
They came with the vehicles.
Yes, indeed it's MPi-KMS-72, or RK 72 TP as it's called in FDF.
The East German 7.62 AK types are
- MPi-K (AK-47; AFAIK Soviet manufacture)
- MPi-KmS (AKS-47; may be GDR manufacture) - these are called RK 54 TP (as are the original 1960's purchased Soviet AKS-47)
- MPi-KM (GDR AKM varint, with GDR-specific Bakelite furniture) - these are called RK 72
- MPi-KMS-72 (GDR folding stock AKM variant, with GDR developed right side folding stock) - these are called RK 72 TP.
The GDR rifles came to Finland in the 1990's, when FDF went on a shopping spree on the GDR surplus wares, which Germany wanted to get rid of. 100 000 GDR-made assault rifles were bought to supplement the Finnish (and Soviet) assault rifles. These included at least MPi-KmS, MPi-KM and MPi-KMS-72, mostly the two latter.
The MPi-KMS-72 has since then became the standard assault rifle for tracked vehicle crews. It's lightweight as it's stamped, it includes a somewhat ergonomic stock (right side folders are more comfortable to carry as a right handed shooter) and it doesn't take much room. FDF has had its Leopard 2 tanks retrofitted for MPi-KMS-72 racks, replacing the West German racks for Uzi.