Interdynamics MKR
| Interdynamics MKR | |
|---|---|
| Type | Assault rifle |
| Place of origin |  Sweden |
| Production history | |
| Designed | 1980s |
| Manufacturer | Interdynamics |
| Specifications | |
| Mass | 3kg |
| Length | 840mm |
| Barrel length | 600mm |
| Action | Blowback |
| Feed system | 50 round magazine |
| Sights | Iron |
The Interdynamics MKR was an assault rifle concept of the 1980s on the top of the "micro-caliber" craze. The idea behind micro-caliber (less than 5 millimeters / .20 inch) ammunition was to achieve high velocity, flat trajectory and good penetration during automatic fire with low recoil. The MKR round was based on .22 Winchester Magnum Rimfire round, with curved taper and 4.5mm / .177" caliber pointed brass bullet. Lightweight bullet (1.58 g / ~24.4 grain) achieved a muzzle velocity of about 1000 m/s (3270 fps). The effectiveness of this bullet was claimed to be on par with 5.56x45mm bullet at the ranges up to 300 meters. Unsurprisingly, the stopping power of such tiny bullet was questionable at its best, and use of rimmed, rimfire ammunition obviously compromised the reliability of the rifle. As a result, Interdynamics MKR assault rifle remained only in prototype stage.