I bought one about 6-7 years ago when they came out, havent shot it in a few years but its lots of fun , I bought the complete full size rifle . Recoil is fairly stout , would not want to experience it in FA and def wouldnt want to subject my 16 lower to the punishment.
I have never had any problems with the complete rifle, I did also buy just an upper at the same time which I sold to a friend and it cracked his lower at the rear pin hole.
The first ammo I purchased with the rifle is marked 500 sw and has the rim turned down , I have a couple of cases of ammo I purchased from Alexander in his second batch of ammo marked 50 beo but the case head is off center and it doesnt chamber
very fun gun if you like shooting things like saplings , cinder blocks old tvs and comodes etc. Performance in pine saplings ,1gallon cans of pork and beans and the like is very similar to hot loads in 444 marlin