Platform first, then the selector, then the parts that keep the gun cycling. A short walk through the decisions that actually matter, using what we stock as the examples.
A forced reset trigger is cut for one fire control pocket. Nothing crosses over, so the first question is what the host is:
A sealed cassette goes in as one piece, which keeps the geometry the maker set and makes the install much harder to get wrong. An open group gives you more to adjust and more to get wrong. If this is your first forced reset trigger, take the cassette.
Ambidextrous selectors cost a little more and are worth it if you shoot from both shoulders or run a high support hand. The ARC Fire V2 is sold by selector throw as well — 0-45-90, 0-45-180, 0-90-180, or non-ambi 0-90-180. Pick the throw that clears your grip and your support hand, not the one that sounds best on paper. A metal ambi selector is a sensible upgrade on a gun that gets used hard.
A forced reset trigger is driven by the carrier, so carrier mass, buffer weight and spring all decide whether the reset is consistent. This is where most complaints come from, and it is usually cheaper to fix than the trigger.
If you would rather not assemble the combination yourself, the bundles do it for you: Disruptor with BCG and H2, Disruptor with the Odin HFRT buffer, or build your own combination.
Underpowered ammunition is the most common cause of an inconsistent reset. Use full power loads while you are setting the gun up, get the buffer and carrier settled, and only then judge the trigger. Give any new fire control group a few hundred rounds before deciding it is not for you.
These are semi-automatic components. Each round fired requires a separate pull of the trigger, and we do not sell machine guns or machine-gun conversion devices. The rules covering forced reset triggers have changed more than once and are not the same in every state. Check the current federal position and your own state law before ordering.