The Adco Super Thumb Jr is a magazine loader built for Smith and Wesson Model 41 and Walther GSP type magazines, and it fixes the one part of a range day nobody enjoys. Thumbing rounds into a rimfire target pistol magazine gets old fast, especially across a long practice session. This little tool takes the sting out of the process for a few dollars.
What the Adco Super Thumb Jr is built for
Bullseye and precision rimfire shooting means loading again and again between strings. A match can have you filling the same magazines dozens of times, and every one of those repetitions costs thumb comfort you would rather spend on the trigger.
The Model 41 and the Walther GSP are serious target pistols with magazines to match, and their followers and springs are not designed around comfort. They are designed around consistent feeding.
The Adco Super Thumb Jr bridges that gap. It gives you the leverage the magazine design never offered, without changing anything about the magazine itself.
Club shooters and league regulars notice the difference first. When you are loading between relays with a clock running, the seconds and the thumb comfort both matter more than they do on a casual afternoon.
Features that earn it a permanent spot in the bag
Loaders like this are among the cheapest quality of life upgrades in all of shooting.
- Fits Smith and Wesson Model 41 and Walther GSP type magazines.
- Makes reloading easier and faster than fighting a stiff follower spring.
- Saves your thumbs across long practice sessions and match relays.
- Speeds up the reload cycle between strings when the clock is running.
- Small, light, and simple enough to last for decades.
- Priced low enough to buy one for every rimfire target pistol you own.
Specifications and fitment details
The fitment list is specific on purpose. Model 41 and GSP type magazines share a profile that a general purpose loader handles poorly, so a dedicated tool is the right answer rather than a compromise.
Target pistol magazines are also expensive enough that nobody wants to risk damaging one. A tool sized correctly for the magazine removes that worry entirely, since nothing is being forced or pried.
Beyond that, the specification sheet is refreshingly short. There is nothing to adjust, nothing to power, and no wear item to replace, which is exactly what you want from a tool that lives at the bottom of a range bag between matches.
The Adco Super Thumb Jr does not modify or contact anything critical on the magazine. It works entirely from the outside, so feed lips and followers are untouched and the magazine performs exactly as it did before.
Practical use, care, and coaching new shooters
Set the loader on the magazine and press rounds home one at a time, letting the tool carry the spring pressure. You spend your time and attention on shooting instead of wrestling with a stiff follower spring, which is worth more in a match than most gear upgrades.
They also make it far easier to introduce new shooters to a day at the range without the frustration that sours a first outing. Keep it clean, keep it with your rimfire kit, and add spare magazines from our magazines and parts upgrades so a practice block runs uninterrupted.
ADCO builds simple, effective loading tools, and this one earns a permanent spot in the range bag of any Model 41 or GSP owner. Keep it stored with the pistol case rather than loose, so it travels with the gun it serves.
As ADCO cheerfully warns, you may need to bring a little extra ammo so you do not run out. That is the only complaint anyone has ever registered about this tool, and it is a good problem to have. Ships direct to your door, no FFL required.
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