Meprolight Smith & Wesson Tru-Dot Night Sight, front only. Fits J-frame with 1 7/8" barrel Contains both front and rear sights Unequaled low light performance Brightest night sights available Used by military & law enforcement All Tru-Dot sights are covered by a 12 year usable illumination warranty to original purchaser Get the Meprolight Advantage Unequaled Low Light Performance Brightest Night Sights Available Today Used by Military and Law Enforcement