This post will be edited later on today to add more content. Caliber: .22 L.R.Capacity: 10 or 25 rdsMode of Fire: Semi-AutoBarrel Length: 16.2 in (412 mm)Barrel Twist: 1 in 13-3/4 inRifling Grooves: 6Rifling Length: 13.78 in (350 mm)Front Sight: Interchangeable PostsRear Sight: Adjustable – Windage & ElevationOverall Length: 26.5–32.5 in (675-825 mm)Overall… Read More »Walther H&K MP5 SD .22lr Review