.22 LR. 5.5" barrel length. SN: 15-68371. Brushed stainless steel finish overall with blued small parts, polished bolt and trigger, and mounting checkered black synthetic Ruger logo grips. Simple blowback operated concealed hammer fired autoloading pistol fed by detachable single stack magazines. Item features a ported barrel with one port to either side of the Patridge front sight, the latter component paired with a fully adjustable white outline rear notch. Rear face of the cocking knob is engraved Mag-na-Port in gold lettering with further embellishments including a {Bullseye} on the right frame, and issue number 164 of the limited edition Mag-na-Ported series. Standard markings include two-line warning and address to left barrel with left frame showing model and caliber mark RUGER 22 CAL. LONG RIFLE/AUTOMATIC PISTOL MARK I. Comes with a Mag-na-port ARMS, INC. shoulder patch.