The Krag–Petersson was the first repeating rifle adopted by the armed forces of Norway and was one of the first repeating rifles to be adopted as standard issue by a military force, being preceded by the Swiss Vetterli adopted in 1867. Developed by Ole Herman Johannes Krag, the action of the Krag–Petersson was uniquely actuated by an oversized hammer. Another distinguishing feature was that the cartridge rising from the magazine was not seated automatically, but had to be pushed into the breech of the rifle.
The action of the Krag–Petersson fieldstripped (refer to the text)
Spent round is pulled out by the extractor, while a fresh round is pushed into the "bed" on the breechblock.
The new round is chambered manually, and the breechblock rises while the hammer stays cocked.
The 12.17 mm rimfire round used in the M1867 and the Krag–Petersson.
A repeating rifle is a single-barreled rifle capable of repeated discharges between each ammunition reload. This is typically achieved by having multiple cartridges stored in a magazine and then fed individually into the chamber by a reciprocating bolt, via either a manual or automatic action mechanism, while the act of chambering the round typically also recocks the hammer/striker for the following shot. In common usage, the term "repeating rifle" most often refers specifically to manual repeating rifles, as opposed to self-loading rifles, which use the recoil, gas, or blowback of the previous shot to cycle the action and load the next round, even though all self-loading firearms are technically a subcategory of repeating firearms.
Circuit Judge revolver mechanism carbine
Opened bolt on a Winchester Model 70. The bolt has an engine turned finish