I have a MP5SD two stamp gun with a Fleming sear and S&H suppressor in a SEF NON ambi pack. I want to transfer it to my MP5K pistol with an AMBI NAVY pack. I have done my research and cannot find a definitive answer to the legalities of this. When I take the sear out of the SEF pack, some have told me the pack is still considered a sear by itself and must be destroyed or sent to a gunsmith, is this true?
After removing the sear from my MP5SD, does the MP5SD become a pistol?
After installing the sear in an MP5K PISTOL, does this make it a "machine gun" therefore legally able to put a stock and VFG on?
Appreciate the help in navigating this topic.
Will this housing work with an extended ambi selector as well?
Thanks for all your help.
As SudS said if the gun started out as a HK 94 you will need to sbr it. I'm guessing the paperwork for the sear lists installed in x gun with x serial on it? Generally you would write a letter to the atf saying you are seperating the sear from the married gun by way of the form 1.
Can't answer the question about the extra sear ready pack but its worth saying the sear isn't going to just drop into the other pack, you will want a gunsmith to install it. You can always send them the entire pack and let them deal with it.
Yes the pack can be moved from the K gun to the 308. You will need different trigger housings for the various guns and need to swap the ejector lever(you have the 9mm, the 40/10, the 5.56, and the 308 ones). You also may or may not need to swap the hammer spring going from 9mm to 308.
Depending on the gun the pack itself might have to be modified some. I believe some of belt fed guns will need the pack modified and Mike Woodward said something about needing to modify my pack for my sp5k(I have a fleming sear pending).
Another thing to consider would be to use a ambi burst pack instead since you are going to have to buy new parts. Upgrade it to give you the most options, it should help it sell a little faster in the future if its in that too.
Also as SudS said yes you can have the VFG on the mp5k style pistol and a stock when the sear is installed. Personally though I'd say just sbr it so you don't have to return it to pistol config when you pull your sear back out of it.
Last edited by sotic; 08-10-2018 at 05:17 PM.