Black Pipe Shotgun - Noisy Cricket
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This homemade and BATF legal shotgun was made mostly from black pipe and black pipe grade fittings. JB Weld was used to glue the components together. The breech plug is a press fit to the receiver pipe (JB welded into the receiver pipe) and supported by a spacer made from black pipe (also JB Welded in). The black pipe reducer fitting supports the spacer and is JB Welded to the receiver pipe. The butt stock pipe is JB Welded to the reducer fitting. All of the pipe thread joints were tightened with pipe wrenches when they were JB Welded.
It was very important to find black pipe nipples that slide together without interference. At the hardware store, I measured several pipes O.D. and I.D. using a precision caliper to find the pieces of 1" pipe and 3/4" pipe that would slide together without bindage. I found that pipe diameters varied by as much as .020" . Some pipes are way out of round which will also cause bindage between pipes. I love my 4" precision caliper (digital) from Harbor Freight. I paid $15 for it and it makes DIY so much easier.
This finished shotgun is never less than 26" long when it's a functional firearm and it can't be made smaller without special tools.
Your state laws may prohibit owning or building this shotgun.
LINK to the National Firearms Act Handbook: https://www.atf.gov/file/58251/download
Please don't ask me to sell you this firearm. I made this firearm for my own personal use and I have no intention of selling it, bartering it, or transferring it to others.
There are many other YouTube videos about these slam fire shotguns.
Destructive testing video: http://youtu.be/BVN8_WeleAA
My Stinky Ugg, tacticool slamfire black pipe shotgun and it's build videos are in CrypticCRICKET's homemade firearms playlist here: http://www.getlinkyoutube.com/playlist?list=PLaSl_p2ZxsHH1ykTBvPcpBI2AODDsH8BO
Another excellent burst pressure link with formulas and also tables by pipe wall thickness.
A precision measuring caliper is extremely useful in building things like this black pipe shotgun: Harbor Freight sells this one: http://www.harborfreight.com/4-inch-digital-caliper-47256.html for $15 and I own one and mine works great!
For further study; links to some pictures from the video:
Noisy Cricket: http://imageupper.com/i/?S0200010090011G13623856321299244
View of the inside surfaces of the barrel and receiver: http://imageupper.com/i/?S0200010100011R13701126471134585
Whole Firing Pin: http://imageupper.com/i/?S0200010030011U1363239813129937
Breech face/firing pin: http://imageupper.com/i/?S0400010070011X13632402291299706
Removable sight mount: http://imageupper.com/i/?S0200010030011F13738079221136081
My new video about making home defense shotgun loads from the same target loads used in this video: http://www.youtube.com/watch?v=g_cSvSWfduQ
Understanding the 2nd Amendment:
Intention of the founding fathers: http://www.largo.org/meaning2.html