Volquartsen Accurizing Kit Ruger Mark IV MK IV & 22/45 Black Trigger VC4AK‑0004

Volquartsen Accurizing Kit for Ruger Mark IV – 19.22 Flat Trigger

Upgrade the complete trigger system in your Ruger Mark IV with the Volquartsen VC4AK-0004 Accurizing Kit, featuring Volquartsen's black 19.22 flat trigger.

Designed for the Ruger Mark IV, Mark IV 22/45 and 22/45 Lite, this complete kit replaces key factory fire-control components while adding the straight trigger face, crisp break and short reset of Volquartsen's newer 19.22 trigger design.

19.22 Flat Trigger with a 90-Degree Break

The 19.22 was developed as Volquartsen's flat-trigger alternative for shooters who prefer a straight trigger face and consistent finger placement.

When paired with the Volquartsen Accurizing Kit, the 19.22 is engineered to provide a crisp 90-degree break, short positive reset and trigger pull under 1.75 lbs.

• Black 19.22 flat trigger
• Crisp 90-degree break
• Short, positive reset
• Under 1.75 lb trigger pull when paired with the Accurizing Kit
• Adjustable pretravel and overtravel
• Designed for consistent finger placement

Complete Ruger Mark IV Accurizing Kit

The VC4AK-0004 is more than a replacement trigger shoe. It combines the 19.22 flat trigger with the primary internal components of Volquartsen's Mark IV Accurizing Kit.

The kit includes:

• 19.22 black flat trigger
• CNC-machined disconnector
• Target hammer
• Hammer bushing
• Target sear
• Trigger plunger and spring
• Pretravel and overtravel adjustment
• Required spacers and small components for applicable Mark IV configurations

Fits Ruger Mark IV & Mark IV 22/45 Pistols

The Volquartsen Mark IV Accurizing Kit is designed for:

• Ruger Mark IV
• Ruger Mark IV 22/45
• Ruger Mark IV 22/45 Lite

This is a Mark IV-specific kit and is not interchangeable with Volquartsen Accurizing Kits designed for Ruger MK II or MK III pistols.

Browse our complete Ruger Mark IV Parts & Upgrades collection for additional components for the Mark Series platform.

Magazine Disconnect Removal

Installation of the Volquartsen Mark IV Accurizing Kit eliminates the factory magazine disconnect.

After installation, the pistol may fire without a magazine inserted. Anyone using the pistol should be made aware of this change before operation.

Flat Trigger vs. Traditional Curved Trigger

The primary difference with the VC4AK-0004 is the 19.22 flat trigger. Its straight face provides a different feel and finger interface than Volquartsen's traditional curved Target Trigger.

Volquartsen developed the 19.22 in collaboration with Creekside Custom as another option for shooters who prefer the feel and geometry of a flat-faced trigger.

More Ruger Mark IV Upgrades

• Ruger Mark IV Bolt & Action Parts – browse bolt, extractor and action-related upgrades for the Mark IV platform.
• Ruger Mark IV Sights – replacement and upgraded sight options for compatible Mark IV pistols.
• Ruger Mark IV Grips & Grip Components – additional grip and control options for compatible Mark Series pistols.

See the complete selection on our Ruger Mark IV Parts & Upgrades page.

Product Details

• Manufacturer: Volquartsen Firearms
• Product: Accurizing Kit with 19.22 Flat Trigger
• Part Number: VC4AK-0004
• Platform: Ruger Mark IV
• Compatibility: Mark IV, Mark IV 22/45 and 22/45 Lite
• Trigger: 19.22 Flat Trigger
• Trigger Color: Black
• Trigger Pull: Under 1.75 lbs when paired with the Accurizing Kit
• Pretravel: Adjustable
• Overtravel: Adjustable
• Made in: USA

Pete's Pillars is an authorized Volquartsen dealer.