I believe the US made had better finished metal parts and tighter tolerances. I have read that the tighter tolerances were a complaint of the Russians, due to the frigid temps causing stuck bolts. I am lucky enough to have several of each. Not one is a complete original, all of them saw war and show it. One has the US eagles and flaming bombs markings. Us soldiers were issued MN 1891s, to fight Bolsheviks, before the Polar Bear Expedition in Arkhangelsk, Russia. Some 50,000 more, supposedly were sent to Vladivostok, Russia to supply the Czech Legion, in hopes that they would re-open the Eastern Front or fight the Bolsheviks. I have seen complete US made US rifles on the online auction sites. They can go for up to $1200; they are beautiful. I have never seen a completely original Russian or French (Chatellerault) made M1891. Several of mine are SA marked, so they saw Finnish military service. It seems that they tried to keep US components together when they could. Perhaps they believed the US made rifles were better finished. Some of the SA marked rifles have very smooth triggers and actions. They are such a heavy, long sighted platform, they can be remarkably accurate for nearly 100 year old, war scarred rifles. I'm not that good a shot and need glasses to see OK, but I can break clay targets at 100 yds consistently with a few of my better shooters.