[Figured it out, and edited...] The thread sizing for the Marauder de-gassing tool for the Marauder SAM is 3/8-24" The rear spring cap/plug looks like it is the same part between the Marauder's, so it should be the same tool fitment. It's total depth, because of the hammer weight in the SAM being new, will probably be different though There I did get a total depth to 2.465" to the outside face of the plug from the hammer weight's recessed spring hole.