IIRC the steel cap from the CF full stock will fit. I like my 452 FS so much that it really doesn't bother me. YMMV
Sub half inch five shot groups at fifty yards are the norm with CCI Velocitor or RWS HV HP ammo. WW Power Point is close, depending on the lot. This is with a Weaver rimfire scope that tops out at 7X.
Great little rifle,IMO.
Ernie