▁Federal ▁Mag num , ▁. 3 5 7 ▁Mag num ▁and ▁. 2 2 ▁L R ) ▁s ights ▁Sp ur red ▁or ▁sp ur less ▁( double - action ▁only ) ▁ham mer ▁ ▁Spec ifications ▁We ight : ▁ 2 ", ▁ 2 5 ▁o z . ▁( 7 0 8 ▁g ) ▁ 3 ", ▁ 2 7 ▁o z . ▁( 7 6 5 ▁g ) ▁ 4 ", ▁ 2 2 ▁L R : ▁ 3 0 ▁o z . ▁( 8 5 0 ▁g ), ▁. 3 2 7 ▁Federal ▁Mag num : ▁ 2 9 . 5 ▁o z ▁( 8 3 6 ▁g ), ▁and ▁. 3 5 7 ▁Mag num : ▁ 2 9 . 5 ▁o z .( 8 3 6 ▁g ) ▁Bar rel ▁lengths : ▁ 2 " ▁( 5 7 . 1 5 ▁mm ), ▁ 3 " ▁( 7 7 . 7 9 ▁mm ), ▁ 4 " ▁( 1 0 1 . 6   mm ) ▁Double - action / single - action ▁Double ▁action ▁only ▁on ▁select ▁models ▁Five - shot ▁(. 3 8 ▁Special , ▁. 3 5 7 ▁Mag num , ▁ 9 × 1 9 mm ▁Par ab ell um ), ▁six - shot ▁(. 3 2 7 ▁Federal ▁Mag num , ▁. 3 2 ▁H & R ▁Mag num ), ▁eight - shot ▁(. 2 2 ▁L R ) ▁Max imum ▁effective ▁range : ▁ 3 3 ▁to ▁ 5 5 ▁yards ▁(