The Colt SMG, a 9mm variant of the AR-15 platform, was developed to compete with the HK MP5 for law enforcement. It features a closed-bolt, blowback action, distinct from the AR-15's direct impingement system. Modifications include Uzi-based magazines with AR-style release notches and a bolt hold-open feature, a plastic gas deflector, and upgraded fire control pins for durability.
The Vila Velebita is a rare Croatian submachine gun produced in 1991 during the Homeland War, designed by Juraj Jelavić and manufactured at a shipyard. It features design influences from the Yugoslav M56 and MP40, chambered in 9mm Parabellum and utilizing a modified Uzi magazine. Production was limited, with an estimated fewer than 200 units made, and it has a simple full-auto-only fire control system with a smoothbore barrel.
The Pleter M91 is a Croatian submachine gun developed in 1991 by Oroplet, with approximately 4,500 units produced. It features a Sten-style bolt and action, with a grip and trigger assembly loosely derived from the MGV-176. The weapon is full-auto only, uses modified Uzi magazines, and lacks a manual safety, relying on the charging handle to lock the bolt. Its design philosophy emphasized simplicity, though it's more sophisticated than a basic Sten.
This review compares the Colt 9mm AR15 SBR with an older Olympic Arms 9mm conversion. It details the direct blowback operation of the Colt, its Uzi-based magazines, and the challenges of loading. The Olympic Arms conversion, using Sten magazines, is shown to have feeding issues and design quirks, highlighting the evolution of pistol-caliber carbines.
This video from SHOT Show 2014 demonstrates the IWI Tavor 9mm conversion kit. The kit allows users to convert their existing 5.56 Tavor rifles to fire 9mm ammunition using Uzi magazines. The conversion is highlighted as a simple, drop-in process that significantly reduces recoil and allows for more affordable ammunition and effective suppressor use. The modularity of the Tavor platform is a key takeaway, enabling quick caliber changes.
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