4.5×26mm MKR
Swedish prototype rifle cartridge / From Wikipedia, the free encyclopedia
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The 4.5mm MKR, also known as the 4.5mm Interdynamic or 4.5mm Kjellgren, was a Swedish prototype rimfire cartridge developed for the prototype Interdynamics MKR bullpup assault rifle and carbine.
Quick Facts Type, Place of origin ...
4.5mm MKR (synonyms: 4.5mm Interdynamic, 4.5mm Kjellgren) | ||||||||
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Type | Rifle | |||||||
Place of origin | Sweden | |||||||
Service history | ||||||||
In service | Prototypes only. | |||||||
Production history | ||||||||
Designed | 1978 | |||||||
Manufacturer | Interdynamics AB | |||||||
No. built | Prototypes only | |||||||
Specifications | ||||||||
Parent case | .22 WMR | |||||||
Case type | Rimfire, tapered, shoulderless bottleneck | |||||||
Bullet diameter | 4.63 mm, 22 mm long, cold-rolled copper, boat-tail spitzer. | |||||||
Neck diameter | 5.02 mm | |||||||
Shoulder diameter | Shoulderless | |||||||
Base diameter | 6.48 mm | |||||||
Rim diameter | 7.44 mm | |||||||
Case length | 26.10 mm | |||||||
Overall length | 42 mm overall length | |||||||
Primer type | Rimfire | |||||||
Filling | 0.51 grams tubular nitrocellulose powder or 0.57 grams spherical double-base powder | |||||||
Ballistic performance | ||||||||
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Test barrel length: 640 mm |
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