MXPB16/90 (to suit 0.9 gun)
MXPB16/10 (to suit 1.0 gun)
MXPB16/11 (to suit 1.1 gun)
MXPB16/12 (to suit 1.2 gun)
MXPB16/13 (to suit 1.3 gun)
MXPB16/14 (to suit 1.4 gun)
MXPB16/15 (to suit 1.5 gun)
MXPB16/16 (to suit 1.6 gun)
