1900 miss-match what do I have?

MichaelH · 02-17-2026, 12:26 PM

My "no matching parts" 1900 Luger is even more so now. I picked up a "shooter grade" (hah) Luger Carbine the end of last year. It was very difficult get the sideplate off. After doing some reading and comparisons. I determined it had a sideplate from a 1906 type or later Luger. I put the correct type sideplate that was on the 1900 Luger on the carbine and the later type sideplate on the 1900 Luger. I shot both guns yesterday. The longer lever on the 1906 type sideplate improved the trigger on the 1900 Luger quite a bit. The Luger Carbine trigger did not seem to be much harder than before. On the 1900 Luger I would like to replace the mainspring/recoil spring with a new made replacement flat spring. I've not seen any sources mention how this is done. Anyone have any tips for me?

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02-17-2026, 12:26 PM	#1
MichaelH User Join Date: Nov 2023 Posts: 23 Thanks: 0 Thanked 32 Times in 12 Posts	My "no matching parts" 1900 Luger is even more so now. I picked up a "shooter grade" (hah) Luger Carbine the end of last year. It was very difficult get the sideplate off. After doing some reading and comparisons. I determined it had a sideplate from a 1906 type or later Luger. I put the correct type sideplate that was on the 1900 Luger on the carbine and the later type sideplate on the 1900 Luger. I shot both guns yesterday. The longer lever on the 1906 type sideplate improved the trigger on the 1900 Luger quite a bit. The Luger Carbine trigger did not seem to be much harder than before. On the 1900 Luger I would like to replace the mainspring/recoil spring with a new made replacement flat spring. I've not seen any sources mention how this is done. Anyone have any tips for me?