Full Auto HK's

[Houndog]

I suspect this is a dumb question, but I know very little about full auto and I've never seen the answer anywhere.

I own a couple of HK and HK clone guns - i.e. CA DOJ Hk94, HK94 clone built for me by IGF, PTR91 and a semi-auto MP5/10 mfg. by Cohaire that I bought from Vector.

My understanding is that the difference between HK semi and full auto is basically in the trigger packs (and full auto bolt). My question is are the HK trigger packs interchangeable? I assume the HK94 and HK clone trigger packs would be, but would the same trigger pack also work on PTR91 and my 10mm HK clone. If the answer is yes, or yes with a few modifications, could I purchase one "registered" auto trigger pack and then swap it between my four HK guns. (I'm not sure I'm even asking this question the right way, but I think you know what I mean).

I've never really investigated full auto before because it's so pricey. But if I could interchange the trigger pack between 4 guns and have the option of making any one of them full auto it might be worth plunking down the money.

 

[boofus]

Yes you can that's why HK sear prices have gone through the roof. A registered sear in a trigger pack can cost upwards of $10,000 now.

I think the only part you need to change in order to use it on different guns is the ejector. You have to be careful when moving the trigger pack around. If you have a rifle that is legal in MG configuration and you remove the trigger pack it is no longer considered a MG and has to abide by regular firearms laws.

If your HK94 has a 10 inch barrel with a sear it's ok, it's a MG. If you swap the pack to another gun and it still has a 10 inch barrel it suddenly becomes an unregistered Short Barrel Rifle, unless you thought ahead and filled out the paperwork to have it registered.