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Looking to dial in your Ruger MK IV's reliability? The Volquartsen Competition Bolt is built to fix what the factory can't. This precision-machined replacement handles the two biggest complaints with stock Mark bolts: failure to fire and stovepipes. Every bolt comes with an upgraded SureStrike firing pin and Exact Edge Extractor pre-installed, giving you the parts where reliability matters most from day one.
The engineering here is straightforward. CNC machining combined with professional grinding creates tolerances tight enough for competition. The black DLC (Diamond-Like Carbon) finish isn't just a cosmetic choice either. It's case-hardened to maximum hardness, then treated with a premium coating that resists wear and drastically reduces friction. You'll notice the bolt cycles smoother right out of the box, and cleanup is noticeably easier since residue doesn't stick the same way.
One feature you'll feel immediately is the extended bolt racker machined integral to the bolt itself. That's the pull handle at the back, and it's a simple change that saves your fingers from that annoying pinch when you're cycling manually or clearing rounds. The overall design reduces residual stress on the metal, meaning the part lasts longer under the heat and stress of regular shooting or competition use.
Fits the Ruger Mark II, Mark III, and Mark IV directly. If you're running a Mark III, note that the loaded chamber indicator needs to be removed for proper bolt clearance. The bolt includes everything installed and ready to drop in, plus you'll get the recoil rod with your choice of spring rates included.
Yes, but you'll need to remove the loaded chamber indicator from your Mark III first. The bolt's profile doesn't clear that component on Mark III models. Mark II and Mark IV fit without modification.
The competition bolt comes with a SureStrike firing pin and Exact Edge Extractor both pre-installed and ready to go. You also get a recoil rod assembly with three spring rates included so you can dial in the right recoil feel for your gun.
One of the main benefits of DLC is that it reduces friction and makes the bolt noticeably easier to clean. The slick finish prevents residue buildup better than standard steel, so you can use less lubrication overall. Regular maintenance is still recommended, but you'll notice less carbon sticking to the bolt.
The upgraded firing pin and extractor geometry are designed to eliminate two common Mark IV issues: failures to fire with standard velocity ammo and stovepipes. The precision fit and reduced friction also just make the gun run smoother overall.
| UPC | 810162015183 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | VC4BT-B |
| Model |
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