Millett makes some but they are kinda bulky:
http://www.millettsights.com/controller ... /rear_semi
MGW has a nice looking sight:
http://www.midwestgunworks.com/page/mgw ... hts/E00169
http://www.millettsights.com/controller ... /rear_semi
MGW has a nice looking sight:
http://www.midwestgunworks.com/page/mgw ... hts/E00169