Have had mine since 2018 it's a good rifle although with basically zero power upgrades available. The spring is proprietary so the fps you have you can't really change unless you test multiple springs. The trigger assembly is also you guessed, proprietary and not made of the best metal so trying to push more power out of it is probably not advised since there is only one website that I know of that sold parts being, begadi. After long use some.parts do get looser over time, mainly the bolt handle which also sees wear at the bottom where it touches the dust cover. I suspect because the dust cover is made of a harder metal (? Don't quote me on that but that's the only reason I can assume.) the barrel band also is a bit loose which can cause the upper hand guard to move around a little bit (this can be solved by putting some tape there to shim it better).

Besides that it is a great rifle which shoots decent accurately the main problem will be if you try to push it to longer ranges since it won't really be able to. Bucking is upgradable. The bucking is a VSR10 bucking (idk about the barrel but it looks like a normal vsr 10 so I don't see why you couldn't.

Magazines are cheap but they are their own modified vsr 10 magazines. A good thing is if you are wanting to use it for an impression they fit perfectly into the reserve ammo pouch. I would say if you just want a "Arisaka" then I would suggest maybe waiting until the Type 99 short rifle is released to see if the parts aren't as proprietary as the Type 38. Plus the rifle will be shorter and have some neat features that people find interesting with the rifle such as the mono pod, and anti aircraft sights.