▁st ap le ▁in ▁the ▁American ▁fire ar ms ▁market , ▁the ▁R ug er ▁Security - S ix ▁series ▁revol vers . ▁A ▁ 9 ▁mm ▁version ▁was ▁available ▁until ▁its ▁dis continu ation ▁around ▁ 1 9 9 8 , ▁but ▁was ▁later ▁re - re leased ▁in ▁early ▁ 2 0 1 8 . ▁A ▁basic ▁. 2 2 ▁L R ▁version ▁was ▁also ▁available ▁until ▁ 2 0 0 3 ▁while ▁a ▁red es igned ▁version ▁was ▁introduced ▁in ▁ 2 0 1 1 . ▁ ▁Fe atures ▁and ▁description ▁The ▁SP 1 0 1 ▁is ▁currently ▁manufact ured ▁in ▁. 3 2 7 ▁Federal ▁Mag num , ▁. 3 5 7 ▁Mag num , ▁ 9 ▁mm , ▁. 3 8 ▁Special , ▁and ▁. 2 2 ▁L R . ▁Bar rel ▁lengths ▁ 2 " ▁( 5 7 . 1 5 mm ), ▁ 3 " ▁( 7 7 . 7 9 mm ), ▁and ▁ 4 " ▁( 1 0 6 . 7 mm ) ▁with ▁full ▁under l ugs . ▁ 4 " ▁( 1 0 1 . 6   mm ) ▁and ▁ 4 " ▁( 1 0 6 . 7 mm ) ▁with ▁half ▁under l ug . ▁St ain less ▁steel ▁construction ▁Transfer ▁bar ▁safety ▁mechanism ▁F iring ▁pin ▁mounted ▁in ▁frame ▁The ▁Transfer ▁bar ▁in ▁the ▁SP 1 0 1 ▁is ▁connected ▁directly ▁to ▁the ▁trigger ▁F ixed ▁( all ▁cal ib ers ) ▁or ▁adjust able ▁(. 3 2 7