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Quick Verdict If the existing exit device is sound and its series is on a kit list, retrofit it: an SDC LR100 kit for Von Duprin 98/99, Falcon or First Choice rails, a Sargent M56A for 80 Series and P Series, a Corbin Russwin CRMELR for ED5000/ED4000, an Accentra RMELR for 7100/7200 rim devices. Order a factory device (Von Duprin QEL, Sargent 56-, Corbin Russwin MELR, Adams Rite MLR or EL) on new openings, fire-rated openings and any device with… Read more