Confirmed Fitment
Rock Island 22TCM Single Magazine Loader
The Rock Island 22TCM Single is confirmed to fit the Super Thumb ST3, the loader ADCO builds for single-stack magazines. It loads Rock Island 22TCM Single magazines faster and with far less thumb strain — a purpose-built tool, not a one-size-fits-all compromise.
Why single-stack magazines pinch
Single-stack magazines have narrow feed lips and a firm spring in a thin body, so the top rounds bite back at your thumb. The Super Thumb seats each round without fighting the feed lips, which is easier on your hands and faster round after round.
Your Fit
Super Thumb ST3
Single-Stack
Width
1.47" (37.3 mm)
Height
0.65" (16.6 mm)
Rock Island 22TCM Single loader — common questions
Which Super Thumb fits the Rock Island 22TCM Single?
The Rock Island 22TCM Single is a confirmed fit for the Super Thumb ST3. It appears on ADCO’s verified Super Thumb fit chart as an exact match.
What kind of magazine does the 22TCM Single use?
The Super Thumb ST3 is built for single-stack magazines, which is the class the Rock Island 22TCM Single uses.
Will the same loader work for my other Rock Island pistols?
Often, yes — many Rock Island models share the same magazine class. Check the other Rock Island fits listed below, or use the Model Finder to confirm your exact model before ordering.
Is the Rock Island 22TCM Single fit guaranteed?
Every Super Thumb is backed by a lifetime warranty. If you’re not certain, confirm with the Model Finder or call ADCO at 781-935-1799 before you order.
Not 100% sure? Confirm before you order.
Super Thumb loaders are model-specific. Use the Model Finder to double-check your exact firearm and magazine, or call ADCO Arms and we'll confirm the right loader for your Rock Island 22TCM Single. Every Super Thumb is backed by a lifetime warranty.