CMMG BANSHEE® Mk4 — .22 LR, Ultra-Compact Rimfire, AR Black Finish | Model 22AC40FAB | UPC 810144722351
Compact, Low-Recoil Rimfire Fun With AR-15 Familiarity
Meet the CMMG BANSHEE® Mk4 in .22 Long Rifle—a compact rimfire built to mirror the controls, ergonomics, and accessory friendliness of your favorite AR-15. Whether you’re introducing new shooters to the platform, knocking down steel on the weekend, or running inexpensive reps to keep fundamentals sharp, the BANSHEE Mk4 .22 LR delivers soft recoil, low cost per round, and serious reliability in a sleek AR Black finish (ARBLK).
Designed around CMMG’s proven rimfire architecture, this BANSHEE configuration uses dedicated .22 components for smooth cycling and consistent accuracy. The result is a lightweight, maneuverable trainer that’s just as at home in tight indoor bays as it is on a rimfire match stage or backyard range (where legal).
Model: 22AC40FAB • UPC: 810144722351 • Finish: AR Black
Why Shooters Love the BANSHEE Mk4 in .22 LR
Real AR Controls, Rimfire Economy
Train like you carry. Enjoy standard AR-pattern controls (safety, mag release, charging handle) with the ultra-affordable .22 LR cartridge. You’ll get more reps, more often—without beating up your shoulder or wallet.
Lightweight, Ultra-Compact Handling
The BANSHEE line is built for short overall length and quick transitions. It’s easy to maneuver around barricades, vehicles, and tight indoor lanes while staying stable on target.
Accessory-Ready Modularity
Free-float handguard and full-length Picatinny optics rail (configuration dependent) make it simple to mount a red dot, LPVO, offset irons, white light, hand stop, QD sling sockets, and more.
Clean, Modern Finish
The AR Black (ARBLK) coating pairs a professional aesthetic with excellent durability against the elements, solvents, and heavy range use.
Key Features at a Glance
Caliber: .22 Long Rifle (dedicated rimfire system for reliable cycling)
Platform: Mk4 (AR-15 pattern) with familiar controls and ergonomics
Configuration: Ultra-compact BANSHEE® layout for fast handling
Handguard: Free-float design with M-LOK® slots (variant dependent)
Top Rail: Optics-ready Picatinny (upper receiver/handguard rail length varies by build)
Finish: AR Black (ARBLK) for low-glare durability
Model / UPC: 22AC40FAB / 810144722351
Exact barrel length, muzzle treatment, furniture, and small components can vary by production run. Always check your rifle’s product label/serialized spec card for the definitive configuration.
What You’ll Notice at the Range
Inexpensive Training, Real Skill Transfer
The BANSHEE’s AR-style manual of arms lets you practice manipulations—shoulder transitions, reloads, positional work—at a fraction of centerfire cost.
Soft Recoil, Fast Follow-Ups
Minimal recoil and muzzle movement mean quicker sight recovery and more enjoyable sessions for new shooters and high-volume practice days.
Free-Float Consistency
By keeping sling/barricade pressure off the barrel, the free-float design supports repeatable accuracy with popular bulk and match .22 loads.
Ideal Use Cases
Affordable Training: Build fundamentals (stance, grip, trigger, transitions) on the AR layout
Steel Challenge / NRL22 / Rimfire Matches: Fast handling with easy recoil management
New Shooter On-Ramp: Confidence-building platform with familiar, intuitive controls
Backyard/Property Plinking (where legal): Low noise and minimal recoil fun for everyone
Smart Setup Recommendations
Optic: A micro red dot keeps things light and fast; an LPVO (1-4×/1-6×) adds flexibility for small targets
Sling: Two-point sling with QD swivels for carry and positional tension
Light & Controls: Compact M-LOK® light (momentary tailcap or remote switch) for low-light reps
Magazines: Use quality .22 LR AR-pattern magazines from CMMG or trusted brands; mark your mags and rotate for reliability
Ammo: Test a few bulk and high-velocity loads—rimfire guns often prefer certain velocities/brands
Technical Specifications (General, See Your Spec Card)
Caliber: .22 LR
Action: Semi-automatic, AR-pattern controls
Barrel/Handguard: Compact BANSHEE configuration; free-float handguard with M-LOK® (lengths vary)
Upper/Lower: AR-15 pattern, optics-ready Picatinny top
Finish: AR Black (ARBLK)
Model Number: 22AC40FAB
UPC: 810144722351
Thread pitch, barrel length, furniture (stock/brace/grip), and included accessories may differ by SKU batch and jurisdiction. Confirm the exact features on your product label.
Frequently Asked Questions
Q: What magazine does it use?
A: The BANSHEE Mk4 .22 LR uses dedicated .22 LR AR-pattern magazines. For best results, use quality mags designed for the platform.
Q: Is the barrel threaded?
A: Many BANSHEE .22 LR models ship with a threaded muzzle, but threading varies by configuration. Check your serialized spec card/product label.
Q: Can I swap to a centerfire upper?
A: The Mk4 uses the AR-15 ecosystem, but rimfire/centerfire parts differ. Consult CMMG’s documentation or a qualified armorer before converting.
Q: What ammo works best?
A: High-velocity .22 LR often cycles most consistently. Try a few brands/velocities and confirm function and zero with your chosen load.
SEO-Rich Highlights & Buyer Keywords
CMMG BANSHEE Mk4 .22 LR ultra-compact AR-pattern rimfire
AR Black (ARBLK) finish, free-float M-LOK handguard, optics-ready
Affordable training rifle with real AR controls and low recoil
Model 22AC40FAB, UPC 810144722351
Rimfire AR trainer for plinking, steel, and fundamentals
Meta Title (SEO)
CMMG BANSHEE Mk4 — .22 LR Ultra-Compact Rimfire, AR Black, Free-Float M-LOK | 22AC40FAB
Meta Description (SEO)
Train more and spend less with the CMMG BANSHEE Mk4 .22 LR. AR-pattern controls, free-float M-LOK handguard, optics-ready top rail, and durable AR Black finish. Model 22AC40FAB, UPC 810144722351.
Structured Data (Product Schema JSON-LD)
Responsible Use Reminder
Follow all local, state, and federal laws regarding rimfire firearms, storage, and transport. Verify your configuration’s specs on the product label, confirm safe function with your chosen ammunition, and practice secure handling at all times.
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