A very special first-run screening takes place at the Sentient Bean Coffeehouse on March 20, as part of the Psychotronic Film Society’s long-running weekly series of underappreciated or downright obscure feature films from around the world. It’s a one-show-only engagement of the gritty, ultra-realistic crime thriller “Get My Gun,” the first narrative feature from indie NYC filmmaker Brian Darwas, who’s previously directed a handful of documentaries on fringe culture.

Despite nabbing top honors, including Best Feature Film, at a prestigious indie horror film fest, “Get My Gun” has only been shown publicly in less than 20 cities in the USA. However, wherever the film has been seen in front of an audience, it has wowed even jaded horror and suspense fans who might understandably not expect much from such an inexpensively made feature boasting no recognizable actors.

Something of a cross between a cinema verité mumblecore drama and an intense, white-knuckle stalker flick, it also manages to roll around in all sorts of scummy yet gloriously retro “grindhouse” exploitation tropes. You know, the kind that make Quentin Tarantino’s palms sweat. Smarter and more nuanced than your average revenge movie, it boasts taut and fairly terrific performances by a small cast that deserve major career boosts based on their work in this under-the-radar picture alone.

The plot? Let’s just say that young, single, underpaid working women cannot be counted on to sit back and simply take being mistreated by violently misogynistic men. But you knew that already, right? Fans of old-school exploitation movies from the 1960s through the 1980s will find much to like about “Get My Gun,” as should folks who just appreciate ambitious DIY filmmaking that’s not afraid to go for the throat. Showtime 8 p.m. for mature viewers only. Please note: Psychotronic discount passes cannot be accepted for this special engagement, but trust me, it’s worth the $10 admission.