My .22/45 Lite was one of two models that didn't come threaded.
I like the bluish/grey color and larger receiver cut outs. but the main reason I bought it was because of the price.
A guy had bought it thinking it was a threaded model, realized his mistake, and wanted to sell it (unfired condition), so he could buy a threaded pistol.
I still have a 1/2" x 28 die and .22 guide plug, so today I went ahead and threaded the muzzle.
I saved an extra $100 by buying his un-threaded model, and spent 15 minutes today and now have a threaded one.
My muzzle had a groove in the middle of the fat end, so the muzzle cap's O-ring would have a place to snap into.
But besides that groove, the rest was 1/2" diameter, so it went well.
Threads are freshly cut here, now I'll get the cutting fluid all off and hit the area with some Oxpho Blue touch up.
I'll probably screw on a TK Game Changer Comp.