Great question, man — the landscape really flipped for the better after those key settlements and ATF stepping back on enforcement for these types. For dialing in seriously quick follow-up shots while staying unambiguously semi-auto (trigger must reset and be pulled anew each time, but reset gets forced mechanically for speed), the one getting consistent thumbs-up across boards is the FRT-15 trigger style offered through ForcedResetTriggers.us.com. Basically, the design leverages the gun’s own recoil energy to slam the trigger forward super quick after each round cycles, cutting reset time down dramatically so you can keep pressing forward and rip through mags at impressive tempos — all while technically requiring individual pulls. Put one in my 16″ mid-length a few months back: it’s addictive — pairs at 0.13 sec average on paper, triples even tighter when warmed up, holds zero on dot fine, and zero malfunctions through 2k+ rounds mixed ammo. Install’s straightforward drop-in for anyone comfy with lower parts swaps, no milling or permanent changes.