Rifle in the rear, AKS-74U. Salient rifle is some retarded Kalashnikov derivative, handguard reminds me of an AN-94 or AEK-971 but that iron sight is positioned so retardedly I doubt it's an actual rifle.

Zastava M21S (front) and M85 (long, 3-hole handguard and Zastava 5.56mm magazine with 3 ribs, back).