DAVIDSON'S MARK IV LITE (RUGER MODEL 43910/MODEL 43915/MODEL 43916)
.22 LR cal., bronze (Model 43910), purple (Model 43915), or green (Model 43916) anodized barrel/receiver assembly with elliptical ports that are parallel with the barrel in lines of two. SN example 401011749 (bronze), known SN range for Pur...