Trigger grouping The trigger and sear are held in the receiver without any pins, each sandwiched between the barrel, barrel collar and receiver wall. Finally the ejection slot is cut through the bottom using a 1mm slitting disc until entering 1mm into the bolt face. This will allow for quick removal of material using an angle grinder fitted with a 1mm slitting disc then further neatened using a 2mm+ grinding disc and hand files. Six holes are then drilled through the length of the bar using a drill press. The hole is then beveled using a 16mm+ drill bit and sanded smooth. A second 10mm bit, modified by removing it's tip is then used to level this hole flat. Top: The lack of any external cocking handle further amplifies concealability while it's large port opening ensures reliable ejection.ħ The bolt piece starts out as a 50mm length of 32mm mild steel bar stock which is marked in it's center and drilled using a 10mm bit until 3mm deep. This document is intended purely for academic study purposes only. It contains a blocked and destroyed dummy barrel and it's dummy bolt features no provisions for a firing pin. For legal reasons, the demonstration prototype pictured was constructed as a non-firing dummy replica. Not to miss out on the availability of modern high tech synthetic polymers, a section of rubber bicycle handlebar grip was incorporated to serve as a comfortable and expedient palm rest. The standard use of 1 1/2 receiver tube and 3/4 lock collars allow for ease of lamination of internal components without using a lathe. A design feature employed to maximize concealability is the inclusion of a single wide port on-top allowing for the bolt to be cocked without an external handle in the same manor as the US M3 Grease Gun. Constructed in it's most concealable form very little protrudes, keeping a slim profile. Specs: Operation: Open-bolt, blowback Cartridge: 9x19mm Capacity: 32rds Overall length: 309mm Height: 110mm without mag (261mm with) Barrel Length: 6.5 Weight unloaded: kg It's small size allows it to fit comfortably into a standard pistol bag. These features result in a sleek and refined appearance, contrasting with the majority of weapons of this type. It's minimalist layout incorporates a single receiver piece to house all components, doing away with the use of any pins or bolts to retain it's trigger grouping.
3 Introduction The following lightweight and highly compact machine pistol design is quick to manufacture and contains a low number of components.
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