KevinJ: For many years (2+ decades!) I have hosted MANY out of state Varmint Hunters - they (as a group!) just LOVE suppressed Varmint guns.
I have shot many of their suppressed Varmint Guns from 308 Winchester bull barreled Rifles on down to 17 Mach2 pistols!
In the Varminting fields quieter is better - but I have not sprung for a suppressor of my own.
I am retired and get more than my share of Varmints and Varminting without going through the time, trouble and expense of obtaining suppressors and afixing them to MY Varminting guns.
Bottom line is I don't care if or if not the Glock Model 44 is "threaded".
I want to get my hands on a Model 44 before I put my dollars down.
Way to go Mr. Glock - I say.
Hold into the wind
VarmintGuy