This video details a specialized Steyr MPi-81 variant designed for the Saurer 4K 7FA infantry fighting vehicle. Key modifications include an extended barrel with a locking lug for vehicle mounting and a 1.5x Steyr AUG-style optic. Unlike some other firing port weapons, this MPi-81 retains its functionality when dismounted and features a mount for a brass catcher.
The Steyr MPi-81 is an Austrian submachine gun heavily inspired by the Uzi design, developed in the late 1960s. It features a telescoping bolt, a grip-mounted magazine, and a cross-bolt fire selector with a progressive trigger for full-auto fire. The MPi-81 incorporates a collapsing wire stock and a non-reciprocating charging handle, along with a dual sear safety system for enhanced reliability.
This video explores the Steyr MPi 81 and its predecessor, the MPi 69. These Austrian submachine guns are discussed as designs influenced by the Israeli Uzi and elements of the Steyr AUG rifle. The unique sling attachment used as a cocking handle on the MPi 69 is highlighted, along with its subsequent removal in the MPi 81 redesign. The description also mentions a port-firing variant with an AUG scope and extended barrel for use in armored personnel carriers.
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