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Since the ramjet afterburner is a ported barrel the ports must match. Best to talk with a qualified gunsmith about this type of upgrade

Radian makes an MR/XR920 specific Ramjet/Afterburner for Shadow Systems guns.

Hi Nicholas and welcome. Yes, the Radian ramjet afterburner compensator combination kit for: SHADOW SYSTEMS™ MR920™ / XR920™ will work. https://www.radianweapons.com/pistol/pistol-parts/4026706