How to disassemble the trigger group.

This specifically pertains to some FA trigger groups modified to semi for civilian use in Europe. USA has different rules on how these has to be modified to be legal, but the basic principal of disassembly is the same, as is it for the other H&K firearms using this trigger system, e.g. HK 91- 93 - 94 - G3 - 33 - MP5 - 41- 43 and various clones/copies.

Remove the trigger group from the grip housing  by rotating the safety selector counterclockwise from "safe" to the 12 o'clock position.

Pull out the safety selector, and lift the trigger group out of the grip housing. The trigger group is now ready for further disassembly.

1. Push the hammer axis pin (1) out of the trigger housing, and lift out the hammer and guide rod with spring from the top side of the housing.

2. Push out the trigger axis pin (2) and the catch axis pin (3) and the trigger with sear and spring should come out along with the elbow spring and spacers. If not, wiggle the trigger while gently pulling downwards. 

3. To remove the ejector lever, push out the pivot pin as indicated with the bullet in the above pic, while holding the lever down to avoid the ejector spring disappearing. Use of live rounds for this is not necessary.

How to assemble the trigger group.

This specifically pertains to some FA trigger groups modified to semi for civilian use in Europe. USA has different rules on how this has to be modified to be legal, but the basic principal of assembly is the same.

 Note:

The sear has a spring loaded plunger that protrudes into the trigger axle hole that makes it difficult to press the trigger axle through the sear. It may help to use the handle of a screwdriver or similar to tap the axle gently into place.

If you assemble your trigger mechanism incorrectly it might cause misfires, or other malfunctions. Beware that the only safety device in the triggergroup is that the trigger is blocked. Altering the shape of any of these parts or removal of material might render the trigger mechanism unusable at best, or right out dangerous in worst case.

If you choose to proceed, you do this on your own risk, and if you somehow manage to break or otherwise ruin your trigger mechanism, well that is your problem. If you are not 100% sure that you can manage to do this, don't do it, or pay someone competent to do it for you.