ZipGun & 50-Caliber Rifle Construction Manual

The Zip, or Pen Gun, as it is sometimes referred to, is perhaps the simplest of all improvised firearms and is usually found in .22 calibre due to the relatively low pressures generated by this small cartridge. I decided that a need existed for a simple homemade version of this tried and tested ‘’contraption’’ and came up with the following design ! I designed this weapon with the caveat that it should be buildable in one day or less, and I think I have achieved that requirement.

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