.22 TCM

22TCM
Type	Pistol/Rifle
Production history
Designer	Fred Craig
Specifications
Parent case	5.56×45mm NATO
Case type	Rimless bottleneck
Bullet diameter	.224 in (5.7 mm)
Base diameter	0.376 in (9.6 mm)
Rim diameter	0.378 in (9.6 mm)
Rim thickness	0.045 in (1.1 mm)
Case length	1.022 in (26.0 mm)
Overall length	1.265 in (32.1 mm)
Ballistic performance
Bullet mass/type Velocity Energy 40 gr (3 g) Pointed flat nose 2,100 ft/s (640 m/s) 392 ft⋅lbf (531 J)

22 TCM case details

The 22TCM (Tuason Craig Micromagnum)[1] is a proprietary bottle-necked cartridge developed by Fred Craig and Rock Island Armory. Before the cartridge was commercialized, it was called the 22 Micro-Mag. Standard factory loads are 40-grain jacketed soft hollow point. Armscor has announced a new round the 22TCM9R which will be the same case as the 22TCM but have an overall length of the 9×19mm round. The company plans to release this round in summer of 2015 with a Glock 22TCM9R conversion slide to allow the 22TCM to fit in a 9mm length magazine, hence the "9R" designation. The 22TCM9R will in fact still be a 39 grain bullet but will be a fully jacketed hollow point instead.

The 22TCM is based on the 5.56×45mm NATO case, shortened so that the shoulder is at approximately the same length as a .38 Super cartridge. The cartridge is designed to feed from a Para-Ordnance-style double-column .38 Super magazine. Currently only Rock Island Armory catalogs firearms chambered in 22TCM: a 1911 style semi-auto pistol (also available with optional additional 9mm barrel and recoil spring), and a bolt-action rifle (which reportedly can use the same magazines as the pistols); and only Armscor (the parent company of Rock Island Armory) manufactures ammunition.

At Shot Show 2015 in Las Vegas a new company, Modern Weapon Systems introduced the first PDW, pistol, short-race-style carbine and SMG chambered in 22TCM named "ION", which will release late 2015. The gun will fire both 22TCM and the new 22TCM9R and will use a proprietary magazine with 35-round capacity. They have also announced an AR-15 conversion kit that will work with their 35-round magazine to be released late 2015 and a dedicated AR-15 lower for those who wish to build a 22TCM AR-15, also in development is a Boberg Conversion kit for the 22TCM9R 39gr bullet to be fired from the Boberg 9mm frame pistols.

See also

• FN 5.7×28mm
• 7.62×25mm Tokarev
• 7.65×25mm Borchardt
• 7.63×25mm Mauser
• 7.65×21mm Parabellum