The premise appeared in the patent record before the GEN-12 became a familiar commercial object: retain the controls, modularity, and lower-receiver architecture of an AR-pattern rifle while replacing its upper assembly and magazine with a purpose-designed 12-gauge system. A May 2014 provisional filing established the earliest priority date for this work; the subsequent 2015 application named Jesus Thomas Collazo and John Edward Short as inventors. Later continuations named Collazo, Teodor Benjamin Puha, and William Erik Dejong. The records document inventorship, not company founding, and no sufficiently authoritative public source reviewed for this profile identifies the founder or founders.
Federal registration data records Genesis Arms as an Idaho company established on 1 April 2014, while the company's own business profile places it in Coeur d'Alene. [1][2] Its early development was unusually concentrated: the patent describes a detachable-magazine, short-recoil 12-gauge upper intended to fit a compatible AR-308-pattern lower without modifying that lower. The magazine geometry was part of the system, with dedicated feed surfaces intended to control rimmed shotshells. ATF manufacturing data records five shotguns made by Genesis Arms at a Coeur d'Alene address in 2018, evidence of small-scale production before the model's broader public presentation.
The GEN-12 reached a wider audience at SHOT Show in January 2019, where Genesis Arms presented both complete firearms and upper assemblies for DPMS Gen 1-pattern lowers. The company published a compatibility note in April, explaining that the upper and its internal components were proprietary, while the lower retained compatibility with the wider .308-pattern parts market. That distinction remains central to the GEN-12. It is not simply a conventional shotgun dressed in AR furniture; its collector interest lies in how far the design carries an established rifle interface into a box-magazine shotgun.
The patent family matured in 2020 and 2021. US 10,605,553 was granted on 31 March 2020, followed by continuation patent US 10,941,995 on 9 March 2021. Both concern the AR-based autoloading shotgun and its detachable-magazine arrangement. The company's present catalog has expanded the underlying design into the 18-inch standard shotgun, short-barrel-model (SBM), personal-defense shotgun (PDS), modern breaching shotgun (MBS), less-lethal (LL) and competition-oriented 3GUN configurations. These are best understood as branches of a single mechanical platform rather than as unrelated model lines.
The platform has also moved beyond specialist commercial circulation. A February 2023 Naval Supply Systems Command purchase order covered a 10.5-inch GEN-12 SBM and ten-round magazines, with a reported value of $21,659. A Taran Tactical-configured GEN-12 appeared in *John Wick: Chapter 4* and subsequently became the basis of the commercial JW4 Dracarys variant. [12][8] In September 2025, the US Coast Guard awarded Genesis Arms a $75,450 fixed-price contract for 5,000 rounds of GSHOT-TSS 12-gauge ammunition for counter-drone use. These records establish specific purchases and a screen association; they do not, by themselves, prove broad military adoption or combat issue. For collectors, Genesis Arms remains a young maker whose significance rests principally on a coherent patented action, a tightly related family of configurations and an unusually visible cultural derivative.
History & Milestones
Company Established and Patent Priority Set
Federal registration data gives 1 April 2014 as the company's founding date, and the GEN-12 patent family claims priority from 8 May 2014. The two records place corporate formation and the core technical concept in the same year.
First Autoloading Shotgun Application Filed
Genesis Arms filed US patent application 14/705,780 on 6 May 2015, naming Jesus Thomas Collazo and John Edward Short as inventors. The application set out the modular upper, short-recoil action, and detachable-magazine concept that would define the GEN-12.
Patent Published and Production Documented
The first application was published as US 2018/0142981 A1 on 24 May 2018. ATF records also show Genesis Arms manufacturing five shotguns at its Coeur d'Alene premises during 2018.
GEN-12 Receives Its Public Introduction
Genesis Arms presented production GEN-12 firearms and compatible upper assemblies at SHOT Show in January 2019. An April technical note then defined the platform's intended relationship with DPMS Gen 1-pattern .308 lowers.
First GEN-12 Patent Reaches Grant
US 10,605,553 was granted to Genesis Arms on 31 March 2020, naming Collazo, Puha, and Dejong as inventors. It formalized the active patent branch covering the AR-based autoloading shotgun and detachable magazine.
Continuation Patent Extends Design Record
The continuation patent US 10,941,995 was granted on 9 March 2021. The second grant preserved the same 2014 priority date and further documented the platform's modular short-recoil and magazine architecture.
Navy Buys GEN-12 Shotgun Equipment
Naval Supply Systems Command awarded Genesis Arms a $21,659 purchase order for a 10.5-inch GEN-12 SBM and ten-round magazines on 8 February 2023.
Coast Guard Orders Counter-Drone Ammunition
The US Coast Guard awarded Genesis Arms a $75,450 contract for 5,000 rounds of GSHOT-TSS ammunition on 24 September 2025. The award notice states that the ammunition was intended to support counter-drone operations.

