1. The big one, the numerous screws to disassemble shell for cleaning. After about 3 disassemblies, the screw heads are starting to wear( with proper screwdriver and torque mind you).
2. Screw for right side mag release lever just falls off( that's been fixed by aftermarket screw of proper...
This is fun to shoot, but that's about it. Maintenance is an absolute horror and forget about parts or upgrades to this thing. In hindsight, should have just bought the Ruger SR-22 like I was going to.
I have shot this rifle twice and has fired perfect everytime. Now that it is sighted, it's a tackdriver! Only problem is the right side magazine lever keeps falling off. Looks like the holding screw is too short. Nice gun except when it come to cleaning it.