Ruger Mark IV Target .22 LR Silencer Shop Exclusive, 5.5 in Threaded Bull Barrel, Blued, 10+1 (Model 40178)
This limited Silencer Shop Exclusive Mark IV Target (Model 40178) pairs Ruger’s one-button takedown with a 5.5 inch cold hammer-forged threaded bull barrel and a blued alloy-steel receiver. Built in 2022 and drilled and tapped for a Weaver/Picatinny rail (filler screws installed), it comes in excellent condition with two factory 10-round magazines and the original case and manual.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Evidence of only light prior handling is present. The firearm presents in excellent overall condition, and the bore is clean and shiny.
What's Included
- Ruger factory hard case
- Ruger Mark IV instruction manual
- Two 10-round Ruger factory Mark IV .22 LR steel magazines
This Silencer Shop Exclusive configuration is a limited-edition variant of the full-size Mark IV Target series, identified by Ruger part number 40178. It was manufactured in 2022 in the USA.
The 5.5 inch alloy-steel bull barrel is cold hammer-forged and factory threaded 1/2"-28, capped with a knurled thread protector. A 1:16 RH twist supports .22 LR accuracy and reliability.
The aluminum frame and blued alloy-steel receiver house Ruger’s straight blowback, semi-automatic action. Controls include an ambidextrous manual safety and a magazine disconnect. The Mark IV one-button takedown speeds routine maintenance. Capacity is 10+1.
Sighting is straightforward with a fixed front blade and a fully adjustable rear. The receiver is drilled and tapped for a Weaver/Picatinny rail, with filler screws installed. Black checkered synthetic grips feature Ruger red phoenix medallions.




