Needed for both MKII and M3 Impact models!!!

Prevents probe from getting loose and backing out.
Especially useful on higher caliber/power setups, or if you regularly swap barrels.
Even on low power setups, the small M3 OEM screw often gets stripped.

Features:

• M4 alignment screw instead of the OEM M3
• M4 clamping screw and clamping slot for gripping the probe
• Machined out of stainless steel
• Designed and manufactured in Seattle WA, USA
• Compatible with any OEM style pellet, pin, or slug probe