The Z-RAM HEAT CORE bolt bumper is a replacement cushioning component for the Milsig/Valken M17. The listing supplies three bumpers and describes a 3 mm, two-component silicone construction. It is a model-specific service part, not a complete regulator or bolt rebuild kit.
What the product record confirms
The listed material has Shore A26 hardness, a stated tear-strength figure of 500 percent and a stated heat resistance up to 250 °C. The record also reports testing up to 2,000 PSI HPA outlet pressure. These are product-record specifications, not permission to operate an M17 at that pressure.
The bumper is described as thicker and more durable than the original part, with the aim of cushioning the bolt cycle. Actual service condition still depends on correct installation, the surrounding bolt system and the marker's approved operating setup.
Fit and package contents
The compatibility statement names the Milsig/Valken M17. The package contains three HEAT CORE bolt bumpers. It does not include the bolt, regulator, seals or other receiver components.
Confirm the exact marker generation and compare the current part shape before service. Do not transfer the M17 fit to a different Valken or Milsig platform from the brand name alone.
View the exact HEAT CORE bumpers
3x HEAT CORE BOLT BUMPER | Milsig Valken M17
Why it belongs: The three-pack is the exact M17 cushioning component covered in the guide.
Decision boundary: It is not a regulator, bolt or complete receiver service kit.
View the HEAT CORE BumpersWhen a bumper replacement makes sense
- The existing bumper shows wear, deformation or damage.
- The marker is the named M17 platform.
- The surrounding bolt and receiver parts have been inspected rather than assuming the bumper is the only cause.
- The current M17 service procedure and pressure limits are available.
A thicker bumper should not be used to conceal a separate regulator, alignment or wear problem. Diagnose the system before replacing parts.
Service without inventing settings
Keep the marker unloaded and depressurized, clean the service area and follow the current M17 instructions. Install only the correct part orientation, inspect nearby seals and verify free movement before a controlled function check.
No pressure or performance setting follows from the listed material test. For another regulator-area component, see the M17 regulator-cap guide.
The maintenance decision
Choose the three-pack when the exact M17 bumper is worn or scheduled for service and the rest of the bolt system has been checked. Choose a different repair path when inspection points to the regulator, seals or another receiver component.
Related HEAT CORE service context
Related HEAT CORE service context
This Z-RAM video concerns another HEAT CORE sealing component in the older Milsig/VKS platform family. It is included as related service context and does not prove the M17 bolt bumper's dimensions, contents or replacement interval.
Watch the Z-RAM videoMore Z-RAM products to explore
These products are shown as separate options or related project context. Check each product page and do not infer compatibility or package contents from proximity alone.
Milsig / Valken M17 HE O-Ring Kit
Why it belongs: The HE O-ring kit is a related maintenance option when the fault concerns sealing rather than bumper cushioning.
Decision boundary: It does not replace the bolt bumper and should be selected only for a diagnosed sealing-service need.
View the M17 HE O-Ring KitImportant Legal Notice
Laws and regulations governing the purchase, possession, installation, modification, and use of the products described on this page vary by country, state, and local jurisdiction and may change. Before purchasing, installing, modifying, or using any product, you are responsible for confirming that it is permitted in your location and for your intended purpose. Product availability or delivery does not mean that purchase, possession, installation, modification, or use is lawful in your jurisdiction. Z-RAM does not provide legal advice, and the information on this page must not be treated as legal advice. If you are unsure, contact the competent local authority or a qualified legal professional.