Dirty Bird Falcon 16" 5.56 NATO 30RD Semi-Auto M-LOK Midlength AR-15 Rifle w/ Atrius Super Selector - 19251

A complete rifle, built around the super selector. Add an optic and go shooting.

Here’s what makes the Atrius Super Selector so cool: it isn’t a trigger, and it isn’t some complicated swap. It’s a safety selector with a third position. Flip past SAFE and SEMI to SUPER-SEMI and your trigger suddenly resets fast — giving you quick, controlled follow-up shots that feel like nothing else on a standard AR. Want to settle back down for precise single shots? Just thumb it back to SEMI. Same rifle, two totally different personalities — all from one flip of your thumb.

The thing about the super selector is that it asks a lot of a rifle — it cycles the action hard and fast, so the rest of the build has to keep up. That’s why we didn’t just drop one in and call it a gun. We built the whole rifle around it, fit it, torqued it to spec, and function-checked it before it ever left the shop. No fitment headaches, no guesswork, no late-night YouTube rabbit holes — it shows up ready to run.

Here’s what makes it run right:

• An H2 buffer, weight-matched to this 16″ mid-length gas system, keeps the action cycling smooth and consistent — exactly what a forced-reset selector wants.
• Our Dirty Bird Enhanced BCG runs a full-auto-profile carrier with relocated load-bearing surfaces to cut down on carrier tilt, plus an HP-tested, MPI-inspected 9310 bolt — the kind of durability that matters when you’re cycling fast.
• Our Dirty Bird Nickel Teflon trigger gives you a smooth, clean break, and it’s exactly the kind of trigger the Atrius is designed to work with. It even ships with a reduced-power spring set if you like a lighter pull.

Three flips of the thumb:

• SAFE — locked up and ready to carry
• SEMI — your normal, accurate single shots
• SUPER-SEMI — forced-reset fire for fast, fun, controlled follow-ups

What you’re getting:

• 16″ 5.56 NATO barrel, mid-length gas — eats a huge range of ammo with a smooth shooting impulse
• The Atrius 3-Position Super Selector — heat-treated 4140 steel, crisp 90° throw, made in the USA — installed and dialed in
• 15″ Dirty Bird SMRS Gen 2 M-LOK handguard — free-float, M-LOK, snag-free octagonal profile, and the ASAL anti-slip/anti-lift mount locks it on so it won’t budge, rotate, or lift
• Dirty Bird Enhanced BCG — 9310 bolt, Black Nitride finish, HP-tested and MPI-inspected
• Dirty Bird Single-Stage Nickel Teflon trigger — smooth, clean break with a reduced-power spring set in the box, backed by the Dirty Bird Limited Lifetime Warranty
• H2 buffer, NOLO forged lower and flat-top upper, A2 flash hider, mil-spec charging handle, A2 grip, M4 carbine stock
• Optic-ready flat-top — mount your favorite red dot or LPVO
• Assembled and function-checked in Youngsville, NC

A few quick things to know:

• Ships to your FFL — a complete rifle is a firearm
• Chambered in 5.56 NATO (also runs .223 Rem)
• Optic-ready — no sights or optic included
• Can’t ship to: CA, CT, DE, FL, HI, IL, MA, MD, MN, NJ, NY, OR, RI, WA, D.C., U.S. territories, or overseas

No logo, no nonsense, no build night required — just add an optic, flip to that third position, and have some fun.