The Danish gunsmith Nicolai Johan Løbnitz came up with a special system of breechloader, that has a very unusual trigger.
Wikipedia (Danish) with his career info: https://da.wikipedia.org/wiki/Nicolai_Johan_L%C3%B8bnitz

In 1834 he manufactured and delivered at Kronborg 25 "Kammerlader Carbines" for the cavalry. [Probably trial weapons].
Picture and info from Arma-Dania: https://www.arma-dania.dk/public/timeline/_ad_gevar_view.php?editid1=58

It seems to have made some people happy as in 1841 he was able to supply the army with the following weapons:

A series of total 310 "Kammerlader Carbines" was produced in 1841 (A) and 1842 (B)
Source (A-series): https://www.arma-dania.dk/public/timeline/_ad_gevar_view.php?editid1=61
Source: (B-series): https://www.arma-dania.dk/public/timeline/_ad_gevar_view.php?editid1=62

In 1841 he also started to make pistols using the same system.
297 of the "Kammerlader Pistols" were produced in Danmark by the "Kronborg Geværfabrik" (Kronborg Rifle-Factory) in Helsingør (Elsinore).
Picture and info from Arma-Dania: https://www.arma-dania.dk/public/timeline/_AD_pistoler_view.php?editid1=25

Danish "Kammerlader Pistol" being loaded (not original type bullet) and shot:
https://www.youtube.com/watch?v=QjzrUYgAzAI
Info page by the shooter: http://www.ctmuzzleloaders.com/antique_guns/k...aders.html

It was Norway - though - where this system was adopted in great quantities:
Between 1842-1870 more than 40.000 "Kammerlader rifles" were build.
Source (with different types): https://en.wikipedia.org/wiki/Kammerlader

Norwegian "Kammerlader Rifle" - Model 1849 - being loaded and shot:
Source: https://www.youtube.com/watch?v=b88yM45n_ZA

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I think you're right. The Kammerlader carbine has an unusually huge trigger guard. :eek: