View Full Version : DIY sbs

May 30, 2010, 08:36 PM
i have the form in hand(looking at it),now i want to make my own sbs,pump shotgun,a little longer than a serbu,but short enough that the magazine tube,and action bars need modification(have a shop full of tools also)could i get some insight or advice from anyone who's done there own mods such as this?.i appreciate any and all input you have for me.



June 2, 2010, 04:38 PM
I don't think you are going to find the information you need on this particular forum. Good luck on your project though.

June 2, 2010, 11:01 PM
Shortening the mag tube is easiest if you shorten it from the receiver end of the tube, unless you have a lathe and can re-thread the end. The magazine tube is soldered nto the receiver and will have to be removed and replaced with heat. Very carefully so as not to damage the receiver. Remember, the mag spring (and possibly the follower)will also have to be shortened.

The easiest way to modify the action bars is to take the material out of the middle of the bars and weld the ends back together, kind of like chopping the top on a car. After welding the bars they will have to be drawn and tempered to prevent cracking.

Unless you are moving the barrel ring back neither of these operations is necessary. If you are, the ring is brazed in place and must be properly orientated to, and spaced from the bottom, of the barrel when put back on. Once again tempering and drawing post welding will be required to maintain the needed strength. If you are not experienced with precision welding, seek competent help before putting fire to metal.

Good luck, build it as described ont the form 1, take a lot of pictures, and share your experience when you're done.


June 3, 2010, 08:48 AM
Go to the NFA section - you need the paperwork completed BEFORE you begin cutting