My secondhand experience with the Russian Remington is that they are inconsistent. Also, Remington did NOT fix one .410 that I sent back 3 times. We finally gave the customer a new shotgun.
They lockup very well and are finished better than the NEF, even if they are, well.......ugly. The point is that they are well polished and the parts, metal to wood, metal to metal, fit well.
That 45/70 double rifle looks pretty sweet though!!!!!!!