Transcription of The Zip Gun
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The Zip Gun
Expedient Homemade firearms Prototype Design Drawings TTHHEE ZZIIPP GGUUNN (Measurements in millimetres unless otherwise stated) TThhee ZZiipp,, oorr PPeenn GGuunn,, aass iitt iiss ssoommeettiimmeess rreeffeerrrreedd ttoo,, iiss ppeerrhhaappss tthhee ssiimmpplleesstt ooff aallll iimmpprroovviisseedd ffiirreeaarrmmss aanndd iiss uussuuaallllyy ffoouunndd iinn ..2222 ccaalliibbrree dduuee ttoo tthhee rreellaattiivveellyy llooww pprreessssuurreess ggeenneerraatteedd bbyy tthhiiss ssmmaallll II ddeecciiddeedd tthhaatt aa nneeeedd eexxiisstteedd ffoorr aa ssiimmppllee hhoommeemmaaddee vveerrssiioonn ooff tthhiiss ttrriieedd aanndd tteesstteedd ccoonnttrraappttiioonn aanndd ccaammee uupp wwiitthh tthhee ffoolllloowwiinngg ddeessiiggnn !
The Barrel can be nothing more than a short length of steel Airgun barrel, turned to a diameter of 12.70mm (½”). The length of the barrel is 75mm. One end of the barrel is chambered using a 5.8mm diameter drill bit to accept the .22 rimfire cartridge. Breech Block The breech block is just a 58mm long section of ½” diameter mild steel bar.
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