I got tired of having to get my 12.3s re-verified in order to sell them.
Marstar did work on my MP40-MP44-PPSh-41 and my Lanchester was stuck in Ottawa for an eternity.
They had all been registered as 12.3s -----the MP40 and Lanchester had been through Forensic Sciences in Toronto in December 1992.

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I had listed two of my 12.6s on CGN ---no action at all.
I decided to get them deactivated by Gunco (something I never thought I would do) and shipped them to Collector's Guild in NB.
The Femaru sold quite quickly and the HSc is still for sale.
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My Civil War stuff is not locked away in my safe and I doubt that the government will bother me for owning this stuff.
OR THIS STUFF.