Colt M4 Mono 5.56mm 11.5″ SBR Semi-Automatic Pistol/Short-Barreled Rifle

The Colt M4 Mono in 5.56mm NATO delivers legendary Colt reliability in a compact, hard-hitting platform. Featuring an 11.5-inch barrel and monolithic upper receiver design, this SBR-configuration firearm offers superior rigidity and accuracy by eliminating the traditional upper/handguard seam — resulting in a rock-solid, free-floated rail system that maintains zero under the most demanding conditions.

Built on Colt’s time-tested M4 architecture, this rifle is engineered for those who demand military-grade performance in a close-quarters package. The monolithic rail system provides full-length Picatinny rail space for optics, lights, grips, and accessories, while the 5.56mm NATO chambering ensures broad ammunition compatibility and hard-hitting terminal performance.

Whether you’re a serious collector, competitive shooter, or suppressor enthusiast looking for an exceptional host platform, the Colt M4 Mono is a premium, hard-to-find title that commands attention. Please note: This firearm is classified as a Short-Barreled Rifle (SBR) and is subject to NFA regulations. Purchaser must comply with all applicable federal, state, and local laws, including NFA transfer requirements.

Order online through VanTon Arms and benefit from our competitive pricing, fast shipping to your local FFL dealer, and access to hard-to-find inventory that most retailers simply can’t source. Check availability today and add a true Colt legend to your collection.