Best wireless lav mic for run-and-gun documentary work under $300?

I've been using the Hollyland Lark M2 for about six months now, and it's become my go-to for run-and-gun work. It's tiny, the magnetic clips are a lifesaver when you need to hide the mic on a subject quickly, and the sound quality is surprisingly good for the price. The range is solid—I've walked 50-60 meters away in a park with clear line of sight and didn't drop a single frame of audio. Battery life is around 10 hours on the transmitters, which is more than enough for a full day of shooting. The receiver has a 3.5mm TRS output that works perfectly with my Sony A7 IV, and it also has a USB-C digital output if you ever want to plug it into a phone or computer. One thing to note: the receiver's gain control is a bit limited—you have three levels (low, medium, high) plus a safety track feature that records a -6dB backup. I always enable the safety track on the transmitter's internal recording, so if the subject clips, I can recover the audio in post. For your loud environment concern, I'd recommend setting the gain to medium and using the safety track—that way you avoid clipping but still have a clean signal. The Comica BoomX-D is also decent, but the build quality feels cheaper and the range is not as reliable in my experience. I'd go with the Lark M2 if you want something that's proven and easy to use.

Thanks for the detailed breakdown, lenswizard95! I was leaning towards the Hollyland Lark M2, but your point about the safety track and gain control sealed the deal. I just ordered one from B&H—the price was right at $199, which leaves me room for a decent shock mount for my boom as a backup. I'll be using it on a documentary shoot next week, so I'll report back on how it performs in the field. Appreciate the help!