Interesting Article with details of what each side is using for small arms
.....Civilian components — bought in gun stores or over the Internet — are popular with soldiers on both sides. Add-ons include custom scopes, silencers and cosmetic features and “reflect a global fashion trend driven by the firearms industry in the West".........A few separatist fighters even carry bolt-action Mosin-Nagant rifles............Another Ukrainian soldier fighting in the east had a $589 Zombie Stopper scope – “guaranteed to help you kill zombies deader,” according to its manufacturer’s claims. Contrast this slew of rusty, older and customized guns in eastern Ukraine with the military gear of regular Russian troops........