It's Chambered In 9mm With A 5” Button Rifled Barrel Supported By A Full Length Guide Rod. Smooth Angled, Snag-free Style Allows For Quick Draw In Fast Need Situations. Includes A Low Profile Adjustable Rear Sight, A High Visibility Fiber Optic Front Sight, Skeletonized Hammer And Trigger With Adjustable Over Travel Stop And Ambidextrous Safety. Finished With A Tough, Parkerzied Matte Coating And Comes With G10 Tactical Grips. True To All Rock Island 1911s, It Comes With A Crisp Factory 4- To 6-pound Trigger, Making It A Great Experience Right Out Of The Box.

SPECIFICATIONS
SERIES  :  ROCK
CALIBER  :  9MM
CAPACITY  :  10
BARREL :   5"
OVERALL LENGTH  :  8.74 INCH
OVERALL WIDTH  :  1.3 INCH
OVERALL HEIGHT :   5.51 INCH 
WEIGHT :   1.13 KG
FRONT SIGHT  :  DOVETAIL FIBER OPTIC FRONT SIGHT;
REAR SIGHT :   LPA MPS1 TYPE ADJUSTABLE REAR SIGHT
GRIPS  :  G10 BLACK/GREY
FINISH  :  BLACK PARKERIZED
ACTION   : SEMI-AUTOMATIC
TRIGGER PULL  :  4 - 6 LBS