Ruger 40178 Mark IV Target | .22 LR 5.50″ 10+1

The Ruger Mark IV Target (40178) is a single-action .22 LR pistol built for precision rimfire shooting and training. It uses a threaded, cold hammer-forged bull barrel measuring 5.50″ and rides on a blued aluminum frame with a black checkered polymer grip. The Mark IV’s one-button takedown simplifies field-stripping for cleaning and maintenance. For optics, the Vortex Venom 3 MOA red dot pairs well with this platform and keeps the overall setup under $1000.

Common applications include bench and precision rimfire target shooting and deliberate marksmanship training.

Product Specifications

• The manufacturer is Ruger / Sturm, Ruger & Co..
• The model is Mark IV Target (40178).
• The caliber is .22 LR.
• The capacity is 10 + 1.
• The barrel length is 5.50″.
• The barrel is described as threaded, cold hammer-forged bull.
• The frame finish is Blued.
• The frame material is Aluminum.
• The grip material is Black Checkered Polymer.
• The safety is Ambidextrous and can be converted to left-side only with the included washer.
• The sights are Fixed Front/Adj Rear.
• The slide/upper component is described as Steel.
• The action is Single Action.
• The receiver is drilled and tapped for Weaver or Picatinny style rail.
• This package includes two 10-round magazines.
• The UPC is 736676401789.

The Mark IV Target provides a stable, predictable platform for rimfire precision work. Its threaded bull barrel and solid sighting provisions make it straightforward to fit an optic or suppressor adapter while the one-button takedown eases routine maintenance. Overall the design favors consistent sight-to-barrel alignment and repeatable operation for range sessions and formal practice.

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