VOLQUARTSEN | RUGER MARK IV TRIGGER UPGRADES
Stainless Good Looks. A Crisp 2.25 lb Break.
The Volquartsen MK IV Accurizing Kit with Stainless Target Trigger is a complete drop-in fire-control upgrade for every Ruger MK IV, including the 22/45 and 22/45 Lite. Volquartsen designs it for a crisp, clean 2.25 lb pull with adjustable pretravel and overtravel—and the stainless trigger is a natural match for stainless MK IV pistols. Made in USA.
The MK IV made takedown simple; Volquartsen makes the trigger exceptional. The Accurizing Kit replaces the factory fire-control parts with a matched set designed to work together: a target hammer, target sear, CNC-machined disconnector and the Target Trigger itself. The result is the kind of clean, predictable break that helps you hold the sights steady through the shot, whether you're running steel plates, shooting bullseye or simply wringing more accuracy out of a favorite rimfire.
A Complete Drop-In Trigger System.
Inside the kit you'll find the CNC-machined disconnector, target hammer, hammer bushing, target sear, and the stainless Target Trigger with plunger and spring, plus Allen wrenches and medium-strength Loctite for the adjustment screws. Pretravel and overtravel let you refine the feel to your preference. Prefer a darker look? The Volquartsen MK IV Accurizing Kit with Black Target Trigger uses the same design.
Build Out Your MK IV.
Add Volquartsen's Bolt Tune-Up Kit for an Exact Edge Extractor and SureStrike Firing Pin, or step up to a complete Competition Kit such as the MK IV Competition Kit with Gold Target Trigger or the MK IV Competition Kit with Gold 19.22 Flat Trigger. Take the build further with the Volquartsen Competition Bolt and, on 22/45 models, the Volquartsen Extended Bolt Release. Ruger owners also look at names like Tactical Solutions and TANDEMKROSS; for the trigger system itself, Volquartsen remains one of rimfire's most established choices. Browse everything in our Ruger Mark IV Parts & Upgrades Collection.
Pete's Pillars is an authorized Volquartsen dealer. We carry genuine Volquartsen upgrades for shooters who want their rimfire to feel as good at the firing line as it looks on the bench.
Product Specifications
Manufacturer: Volquartsen Firearms
Product: Accurizing Kit for Ruger MK IV
MPN: VC4AK-ST
UPC: 810162017293
Compatible Pistols: Ruger MK IV, MK IV 22/45 and MK IV 22/45 Lite (factory frames)
Trigger: Stainless Target Trigger
Designed Trigger Pull: 2.25 lb
Trigger Adjustments: Pretravel and Overtravel
Included: CNC-Machined Disconnector, Target Hammer, Hammer Bushing, Target Sear, Target Trigger with Plunger and Spring, Allen Wrenches, Medium-Strength Loctite
Magazine Disconnect: Eliminated by Installation
Manufactured: Made in USA
Frequently Asked Questions
What's included, trigger options, MK IV compatibility, and ordering genuine Volquartsen components.
What's included in the VC4AK-ST Accurizing Kit?
A CNC-machined disconnector, target hammer, hammer bushing, target sear, and the stainless Target Trigger with plunger and spring, plus Allen wrenches and medium-strength Loctite for the adjustment screws.
Will it fit my MK IV 22/45 or 22/45 Lite?
Yes. Volquartsen designed this kit for all Ruger MK IV variations, including the 22/45 and 22/45 Lite, with factory Ruger frames. Compatibility with aftermarket frames is not guaranteed.
Is this the Target Trigger or the 19.22 Flat Trigger?
This kit uses Volquartsen's stainless Target Trigger, designed for a 2.25 lb pull. The 19.22 Flat Trigger is a separate configuration that Volquartsen rates at 1.75 lb.
Does it change the magazine disconnect?
Yes. Installing the kit eliminates the factory magazine disconnect, so the pistol can fire with the magazine removed. Everyone handling the pistol should understand that change. Follow Volquartsen's installation instructions and function-check the pistol before use.
Does it fit a MK II or MK III?
No. This kit is specific to the Ruger MK IV. Earlier MK II and MK III pistols use different fire-control parts and require a MK II/MK III Accurizing Kit.
What's the difference between the Accurizing Kit and the Competition Kit?
The Accurizing Kit covers the trigger and fire-control system. A Competition Kit adds the Bolt Tune-Up Kit—Exact Edge Extractor and SureStrike Firing Pin. See the MK IV Competition Kit for the complete package, or add the Bolt Tune-Up Kit separately.
Is Pete's Pillars an authorized Volquartsen dealer?
Yes. Pete's Pillars is an authorized Volquartsen dealer offering genuine Volquartsen Ruger Mark IV upgrades. We stock accurizing kits, competition kits and bolt upgrades so you can build your next precision rimfire project with confidence.
Small Change. Big Impact. Pete's Pillars.
