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The .22 TCM cartridge is a genuine one-of-a-kind. Developed by custom gunsmith Fred Craig in collaboration with Armscor president Martin Tuason, it takes a shortened 5.56 NATO case, necks it down to .22 caliber, and stuffs it into a 9mm-pattern double-stack magazine. The result is a 40-grain jacketed hollow point leaving the muzzle at well over 1,850 fps from this 4.3" barrel, with a recoil impulse that's been described as sitting somewhere between a .22 LR and a 9mm. The muzzle flash is dramatic. The felt recoil is not. It's a combination that makes for a ridiculously fun afternoon at the range.
Rock Island builds this pistol on a double-stack 1911 frame machined from 4140 ordnance steel, giving you 17+1 capacity in a Commander-length format with an 8" overall length that carries and handles well. The PECVD ArmorLube finish is tougher than standard parkerizing and gives the pistol a slick, dark matte look. Up top, you get a fixed fiber optic front sight paired with a TRT1 adjustable rear, which is a step up from what you'd expect at this price point. The skeletonized hammer and trigger with an adjustable over-travel stop keep the trigger feel crisp, and the beavertail grip safety adds a classic 1911 touch to the ergonomics. Checkered polymer grips round things out and keep the weight down.
The Standard MS sits right between the full-size 5" models and a compact carry gun. At 2.5 lbs unloaded with the 4.3" barrel, it's comfortable to shoot for extended sessions. The 1:16" twist rate barrel is well-suited to the 40-grain projectiles Armscor loads for this cartridge, and the trigger pull comes in at 3 to 4.5 lbs depending on where the over-travel stop is set. One heads-up for new .22 TCM owners: this isn't a caliber you'll find at every big box store, so it's worth keeping a healthy supply of Armscor factory ammo on hand. The good news is that ordering in bulk is easy and the per-round cost is reasonable compared to other high-velocity specialty rounds like 5.7x28mm.
The .22 TCM is a bottlenecked centerfire cartridge built on a shortened 5.56 NATO case, necked down to fire a 40-grain .22 caliber bullet at very high velocity. Out of the 4.3" barrel on this mid-size model, expect muzzle velocities in the neighborhood of 1,850 fps or better. The combination of high speed and a lightweight bullet means recoil is genuinely mild, roughly between a .22 LR and a 9mm, though the muzzle flash and report are definitely attention-grabbing.
It's not something you'll stumble across at a gas station, but it's not hard to source either. Armscor is the primary manufacturer and their 40-grain JHP loads are available from most major online ammo retailers in single boxes and bulk packs. Keeping a good stock on hand is the smart move since it's a specialty caliber with limited brick-and-mortar availability.
PECVD (Physical Vapor Deposition Coating) is a harder, more corrosion-resistant surface treatment than traditional parkerizing. It bonds at the molecular level rather than just sitting on top of the metal, so it handles wear and moisture better over time. It also gives the pistol a cleaner, more uniform dark matte appearance straight out of the box.
This specific model, the Standard MS (MPN 56878), ships as a dedicated .22 TCM pistol and does not include a 9mm conversion barrel. Rock Island does sell combo kits that include both barrels separately. Converting to 9mm on TCM-platform 1911s requires swapping the barrel, recoil spring, and extractor, so it's not a field-strip-level swap, but gunsmiths familiar with 1911s can handle it.
Yes, the MS designation stands for mid-size, and it fits the Commander-size 1911 profile with a 4.3" barrel and an 8" overall length. It's shorter and slightly easier to carry than the full-size 5" TCM models while still giving you the full 17+1 double-stack capacity. At 2.5 lbs unloaded, it balances well for both range use and general-purpose carry.
It does, especially with a cartridge like .22 TCM where the flat, high-velocity trajectory can shift point of impact noticeably at different distances. The TRT1 adjustable rear sight lets you dial in elevation and windage rather than relying on a fixed sight picture. Combined with the fiber optic front sight for fast target pickup, the sighting package on this pistol is genuinely well-suited to recreational range use.
| UPC | 4806015568780 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 56878 |
| Action | |
| ATF Type | Pistol |
| Barrel Length | 4.3" |
| Caliber/Gauge | .22 TCM |
| Capacity | 17 |
| Color | Black |
| Length | 14.0500 |
| Number of Magazines | 1 |
| Package Height | 2.75 |
| Package Width | 14.0 |
| Product Type | Semi-Auto Pistol |
| Shipping Weight | 6.4 |
| Sights | RS: TRT1 FS: Fixed Fiber Optic |
| Sights Type | ADJUSTABLE |
| State Restriction (IL) | NO SALE TO ILLINOIS PICA |
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