Cock on the closing?
Didn’t they go to cock on the opening with the 721/722 series?
Wonderful old rifle! I really like the stock egros...........
Thats not a 721/722. Not even close. Its a rifle made from leftover WWI rifle parts from M1917's. It also not a "MK14" either, as the op suggested, no such animal. Basically a factory sporterized m1917 that remington worked over way back in the day. Think 1926-1940. However, this rifle is custom. It's a very nicely done custom with its custom barrel and stock with very nice bluing. Whoever put it together did some nice work. It looks like it still has its military trigger. I'd install a Timney and then check the ejector and make sure it's an upgraded coil spring ejector. If not, it's going to break on you when you least expect it. Its inevitable. Cock on closing or cock on open makes no difference to me. They are both just fine, but cock on close may be a little weird for some guys to get used to.
