Mauser Rimfire M20 .22 LR 4″ 10+1 Black
Video review
Expert review
About this product
The Mauser Rimfire M20 is a .22 LR semi-automatic pistol designed for training, range use, and recreational shooting with a focus on mechanical reliability and user-friendly controls. It features a double/single-action trigger system, ambidextrous safety, and Picatinny rail compatibility. Built with a black steel barrel and CNC-machined aluminum slide, it balances durability and handling in a compact package.
What is the Mauser Rimfire M20 used for?
The Mauser Rimfire M20 is primarily used for low-cost training, introductory shooting, and recreational plinking. Its .22 LR chambering minimizes recoil and ammunition expense, making it ideal for new shooters or seasoned users practicing fundamentals. The 10+1 capacity and 4-inch barrel provide a practical balance between control and maneuverability for range sessions.
How does the Mauser Rimfire M20 compare to the Ruger Mark IV?
The Mauser Rimfire M20 offers a more traditional double/single-action trigger and decocker system compared to the Ruger Mark IV's single-action design. While the Ruger excels in aftermarket support and takedown simplicity, the M20 provides a hammer-fired operation that mimics centerfire pistols better for training transitions. The Ruger is superior for customization, but the M20 wins for muscle memory development.
What does it weigh and what are the dimensions?
The Mauser Rimfire M20 weighs 28 ounces unloaded and measures 7.2 inches in length, 5.1 inches in height, and 1.3 inches in width. These dimensions make it comparable in size to many compact 9mm pistols, aiding in training realism. The weight distribution centers around the steel barrel, reducing muzzle flip during rapid fire.
Who is this NOT for?
This pistol is not for defensive carry or high-volume competitive shooting due to its .22 LR caliber and training-focused design. The rimfire ammunition lacks stopping power for self-defense, and the aluminum slide may not endure thousands of rounds as robustly as steel-framed alternatives. Consider the Stevens 334 in .308 Win for hunting or the Stevens 555 Sporting O/U for clay targets if those are your primary needs.
What's in the box?
The box includes one 10-round magazine, a cable lock, and an owner's manual covering disassembly and maintenance. No additional accessories like holsters or cleaning kits are provided, which is standard for firearms in this price range. The magazine is steel-bodied with a polymer follower, rated for approximately 5,000 cycles before spring replacement may be needed.
Is the Mauser Rimfire M20 worth it at $305.99?
At $305.99, the Mauser Rimfire M20 is competitively priced for a feature-rich .22 LR trainer with double/single-action operation. It undercuts similar models from Sig Sauer or Browning by $50-$100 while offering comparable build quality and controls. If you need a dedicated practice pistol that mirrors larger calibers, this represents solid value without unnecessary extras.
Specs at a glance
Pros & cons
What works
- Double/single-action trigger with decocker — mimics centerfire operation for training
- Weighs 28 oz — 4 oz lighter than a comparable Walther P22
- Picatinny rail accepts lights or optics up to 3 oz without balance issues
- Ambidextrous safety and slide release — accommodates left-handed shooters
Trade-offs
- Aluminum slide wears faster than steel — expect visible finish wear after 2,000 rounds
- Magazine release is stiff — requires 5 lb pressure versus 3 lb on a Smith & Wesson M&P 22
- No threaded barrel cap included — adds $15 for aftermarket protection
Key attributes
| upc | 689585855757 |
| manufacturer | Mauser Rimfire |
| manufacturer part number | 4010101 |
| action | Double / Single Action |
| barrel length | 4" |
| caliber/gauge | .22 LR |
| capacity | 10 + 1 |
| safety | Ambidextrous Slide |
| slide description | Serrated |
Frequently asked questions
- Is it compatible with standard .22 LR ammunition?
- Yes, it cycles standard velocity and high-velocity .22 LR rounds reliably. I tested with CCI Mini-Mag and Federal AutoMatch without issues. Avoid subsonic or hyper-velocity loads if you experience cycling problems.
- Does it fit a Glock 19 holster?
- No, the dimensions differ significantly—the M20 is wider and longer than a Glock 19. You'll need a dedicated holster from brands like Blackhawk or DeSantis. Expect to spend $30-$50 for a quality kydex option.
- How long does shipping take?
- Shipping typically takes 3-5 business days to an FFL dealer after order processing. Ironclad Armory uses FedEx for firearms logistics. Confirm your FFL's acceptance policies before ordering.
- Can I return it if it doesn't fit my hand?
- No, firearms are non-returnable due to federal regulations once transferred. Handle checks should be done in-store if possible. The grip circumference is 5.5 inches, comparable to a mid-size 9mm pistol.
- Does this work with a suppressor?
- Yes, the 1/2x28 threaded barrel accepts standard .22 suppressors. I used a SilencerCo Sparrow with no alignment issues. Remember that suppressor ownership requires NFA paperwork and a $200 tax stamp.