Advancing the Platform
Redefining the Payload
Detac RS-10
The DETAC RS-10 is a true AR-platform shotgun, sharing the charging handle, gas system, and BCG with its rifle counterpart. Weighing just 7.6 lbs, it runs on a DPMS Gen1 .308 lower and swaps uppers and mags in seconds for 7.62x51mm or 6.5 CM configurations.
A revolutionary all-polymer, rimless shotshell compatible with standard loading components and processes. Available in hard-hitting 12-gauge 2.75" lead and tungsten loads, the
RS-10 Rimless Shotgun System delivers flawless feeding, extraction, and ejection.
PRODUCT FEATURES
MISSION
VERSATILITY
Can be used for combat, breaching, C-UAS, and non-lethal purposes while being directly compatible with typical AR10 lowers.
RIMLESS
SHELL
Rimless design and belted hulls allow for true, reliable AR feeding and extraction from a detachable box magazine. Single material shells allow for efficient production and easy recycling.
AR
CONTROLS
From safety and charging handle to mag and bolt release, the RS-10 is equipped with the same, familiar AR controls as all standard AR platforms allowing a direct transfer of skills for the operator.
OPTIMIZED FOR
SEMI-AUTOMATIC USE
Rimless design allows for typical AR direct impingement operation and other AR technology advancements to be used for shotgun payloads.
AR10
COMPATIBILITY
The 12 GA Auto upper is compatible with any
DPMS Gen1 AR10 lower, allowing this platform to serve in a variety of missions sets and roles.
BREACHING
CAPABILITY
Allows for a seamless transition between AR and breaching operation and functionality, providing the end user with a familiar, logical solution in high-consequence scenarios.
Designed for breaching and close-quarters dominance, this CQB shotgun delivers unmatched familiarity and modularity. With identical form factor and controls to a standard AR platform, operators experience zero learning curve during transitions. The compact platform allows seamless adaptation between 5-round and 8-round polymer magazines to meet mission-specific requirements. Whether clearing rooms or breaching doors, the MB-10 combines the stopping power of a shotgun with the ergonomics and handling of a rifle. For added versatility, the upper can also be swapped to accommodate a 7.62 x 51 or 8.6 Blackout configuration, expanding its role beyond entry to full-spectrum tactical use.
Rimless cartridges revolutionized rifles and pistols, enabling simpler magazines, lower parts counts, and more reliable feeding, extraction, and ejection. Features like capture-style bolts and plunger ejectors became possible thanks to rimless ammo. These improvements dramatically advanced modern, mag-fed firearms. Shotguns, however, never saw this evolution. The shotshell remained rimmed, and aside from switching from paper to plastic, the hull hasn’t changed much in a century. Today’s hulls are complex, multi-material, and costly to produce, further stalling innovation. Rimmed shells were never meant for autoloading box-fed systems, and it shows. Until now.
Detac Arms proudly introduces the 12 GA Auto: the world’s first rimless, all-polymer 12ga shotshell. It’s fully compatible with existing components and loading methods, built for capture bolts, single extractors, and plunger ejectors. Tested to meet or exceed SAAMI specs, and available in hunting, defense, and tactical loads --
This is the innovation shotgun systems have been waiting for.
Rimless Shotgun System
A shotgun built on an AR-style platform offers users immediate familiarity with controls, ergonomics, and handling, reducing training time and increasing confidence in high-pressure situations. This design also unlocks true modularity, allowing operators to adapt the weapon to mission-specific roles with easily interchangeable components. Whether configured for less-lethal use, close-quarters engagement, or ballistic breaching, the platform maintains consistent performance. Uniquely, it also offers the ability to swap the upper receiver for a match-grade rifle barrel, giving users the flexibility to transition from a breaching or entry tool to a precision rifle system without changing lowers. When paired with a rimless, box-fed shotshell and a bolt carrier group designed for seamless cycling, this system delivers rugged reliability and multi-role adaptability in a single, familiar platform.