The application pertains to 1911 style firearms. The firearms can have a relief and/or an ambidextrous slide stop. The firearm frame can have a relief to capture debris. The relief can sit below where the barrel sits once assembled with the frame. The relief can be shaped such that debris that would typically be held in the barrel void would instead fall into the relief. The firearm can have an ambidextrous slide stop. The slide stop can incorporate a male-female interlocking mechanism allowing for secure and removable coupling.