USPSA Limited Division Guns

If a gun doesn't meet the USPSA Production requirements, but is not ported and has iron sights, it will most likely meet the USPSA Limited division requirements. The Limited division allows things such as slide lightening, >10 round magazines, no weight restrictions, mag-wells, all sorts of external customizations, and has no restrictions on holsters or mag-pouch positioning. It specifically does not allow Optics of any kind and/or barrel porting or comps. The exact restrictions can be found in Appendix D2 of the USPSA Rule Book.