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Legality of Thompson Trigger Frame in California


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Hey everyone

Just bought my first NFA Thompson and it came with extra parts including a complete trigger frame I do not need. I was looking to sell it and have a buyer in California. My questions are 

is a complete trigger frame legal to send to California? I know it can be sent really anywhere but unsure of California. 

is still has the full auto switch, but from my understand you can just put it on a receiver and it go full auto. That is really my only concern. I’ve been told it’s just gun parts and no problem, just trying to learn more. Yes I contacted the ATF and asked them to really no help. 

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It will not fit a semi as the reciever's/bolts are different sizes.  Plus full auto sits lower.  It would be like selling HK push pin lower.  Wont fit or turn a semi HK into machinegun without modifications.

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MG parts are illegal to possess in WA if I'm not mistaken. So be careful with selling anything to people living there, but I don't think CA is so strict.

Edited by Chef
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The selector switch in the Thompson doesn't make the gun full auto.  If you yank it out of the gun, all you get is full auto.  The switch activates a trip that disengages the sear from the trigger so you have to release the trigger and pull it again to get another shot off.  Without it- full auto only. 

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On 4/27/2024 at 2:26 PM, sport10990 said:

Yeah I saw that but the Thompson trigger frame is not the receiver and by frame, I assume they mean a lever gun frame. My concern is the selector switch on it 

I looked at this a little closer and it appears the new rules are for precursor parts which I take to mean an unfinished receiver. Simple parts sales are not yet restricted. I don’t think there is any special rule singling out the selector. However I am in California at the moment so on my next visit to town I will ask at one of the gun shops. 

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