Upgrade your Ruger rimfire pistol with the TandemKross KrossFire Bolt for Ruger Mark IV & 22/45 Pistols. Precision CNC machined and finished with a durable, wear-resistant coating, the KrossFire Bolt is built to deliver smoother operation, improved reliability, and long-lasting performance.

Available with premium finish options including black DLC or gold Titanium Nitride (TiN), this upgraded bolt is designed to reduce friction, resist corrosion, and minimize wear during use. Each bolt comes fully assembled with trusted TANDEMKROSS internal components, including the Sentinel Guide Rod, Eagle’s Talon Extractor, and Fire Starter Titanium Firing Pin.

The integrated halo Charging Ring makes charging and clearing your pistol easier, giving you better control and faster operation without adding bulky hardware. Whether you are upgrading for range use, competition, or improved everyday performance, the KrossFire Bolt is a premium drop-in style upgrade for Ruger Mark series pistols.

Key Features

• Precision CNC machined bolt for reliable performance
• Wear and corrosion-resistant finish
• Available in black DLC or gold Titanium Nitride finish
• Fully assembled with TANDEMKROSS upgraded internal parts
• Includes Sentinel Guide Rod, Eagle’s Talon Extractor, and Fire Starter Titanium Firing Pin
• Integral halo Charging Ring for easier charging and clearing
• Charging Ring available in black, red, or gold
• Extractor plunger geometry simplifies disassembly, cleaning, and maintenance
• Backed by the TANDEMKROSS warranty

Supported Models

• Ruger Mark II
• Ruger Mark II 22/45
• Ruger Mark IV
• Ruger Mark IV 22/45

Important Notes

A very light application of your preferred light lubricant on the bolt body is recommended.

The TANDEMKROSS KrossFire Bolt is designed to accept TANDEMKROSS internal components and function in factory Ruger Mark IV and Mark IV 22/45 receivers/uppers. Compatibility with aftermarket receivers or uppers is not guaranteed.

The KrossFire Bolt can be made compatible with factory Ruger Mark III and Mark III 22/45 pistols if the factory Loaded Chamber Indicator is removed, or when paired with the discontinued TandemKross LCI Replacement.

Warranty

The KrossFire Bolt and integral halo Charging Ring are protected by the TANDEMKROSS Lifetime Warranty against mechanical failure. TANDEMKROSS firing pins, extractors, and springs are protected against mechanical failure for two years from the date of purchase.