Originally Posted by
Ak44
If you have a registered receiver hk machine gun you can buy those trigger packs and put them in no problem and be perfectly legal.
If you have a registered sear, you can send the sear to a HK gunsmith and have them install it into the trigger pack of your choice, and they will keep the sear that comes with the trigger pack (as it is an unregistered sear).
If you have a semi auto host gun you can't buy those and have them together as you can manufacture a unregistered machine gun with them (since there is a unregistered sear inside of the trigger pack).
Those trigger packs listed are useless because it is illegal to possess them if you have a semi auto hk or hk clone. Not to mention it will not fit because of the shelf in semi auto hk's and lack of the push pin hole.
The term "clipped and pinned" is a cosmetic modification done to trigger packs to make it seem that a semi auto hk has the look of a push pin swing down HK. This modification does nothing to allow select fire or anything like that. Adding a Paddle mag release, when done wrong can constitute making a machine gun because you can drill a hole into the receiver allowing the possibility of full auto trigger pack.
Also I had a very long and interesting conversation with the ATF Technical branch a year and a half ago regarding the Sear caliber. According to the ATF a Sear does not have a caliber. Ads that list "Sear is registered in 223, 308 and 9mm" is wrong as the sear itself does not have a caliber. My form 4 says "Machine Gun Sear" BBL Length: NA Caliber: NA Overall Length: NA