Uzi barrel question?
This is a "FOR EDUCATIONAL PURPOSE ONLY" question:
Will a 10" SMG UZI 9mm barrel fit a UZI Model B semi-auto carbine?
I am not planning on doing this. I just want to know if it does or does not. If not, why not? Are the ODs different?
If I was going to do it, I would permanently mount a 6+" fake suppressor to the end of the 10" barrel to make the total length 16+"
Edited by - Diablo on 11/06/2002 19:22:51
Will a 10" SMG UZI 9mm barrel fit a UZI Model B semi-auto carbine?
I am not planning on doing this. I just want to know if it does or does not. If not, why not? Are the ODs different?
If I was going to do it, I would permanently mount a 6+" fake suppressor to the end of the 10" barrel to make the total length 16+"
Edited by - Diablo on 11/06/2002 19:22:51
0
-
I will compare only the Action Arms UZI's made by IMI for this answer. The patents ran out a long time ago and many different countries and manufacturers have made these guns.....some are exact replicas, others have various changes to various degrees which makes them slightly different or a lot different.....etc., and etc.
Full Auto guns with a 10.1 inch barrel use a different feed ramp, one which is a modified Semi Auto Ramp. The Semi Auto has a round ring over the top and the semi barrel slides into it for support on the breech end. The full auto feed ramp appears as if the upper port of the ring is cut off and the barrel is machined with a notched sort of end that engages the feed ramp. This notch is a ring sort of thing that goes all around the end of the barrel The full auto barrels are supported differently and have a machined area that touches the floor of the receiver where the semi auto doesn't. Some machining on the barrels will make them function but it is not worth the work and hassle because you can cut off a 16.1 inch semi barrel.
Easiest way to get a functional semi auto barrel in 10.1 inch length is to cut it off. This was done to many barrels as the early UZI's were legally converted to full auto and the original barrel was shortened by cutting it off.
I have seen quite a few Cobray barrel extensions that are threaded on the end used as an extension on an UZI barrel. These are about 6 inches long. When a semi barrel is cut down to about a 10 inch barrel and is threaded to accept the adapter nut required to screw on a Cobray ventilated barrel extension, you come up with a legal length barrel of 16 inches or more. That is, if you don't cut the 16 inch barrel too short. These are awsome looking when done this way. They are also legal because the barrel is over 16 inches long, and you have another hand hold on the barrel extension which is ventilated and keeps you from being burned by a hot barrel.
Just remember, the BATF requires all rifles/carbines to have a barrel at least 16 inches long. The UZI factory barrels are 16.1 inches long to be sure. Good idea to make it at least 1/4 inch longer in case the agent who might examine it has a "short ruler." Then when you screw on the barrel extension it becomes a length greater than 16 inches and is therefore legal on a Non Class III Semi Auto gun.
Full auto guns are Class III registered as a Machine Gun and therefore can have the short barrel length. But, that wouldn't keep you from using a 16 inch barrel on it, either.
Hope this helps. Let me know if you need any other UZI info.
Fish Shudder at the sound of my Name!0 -
Diablo, to further your quest for higher education I can tell you that a semi-auto UZI will not accept a submachinegun barrel. When the importer , Action Arms, brought these rifles in they left few stones unturned in keeping them true "sporters". I'll give you the Readers Digest version here and save on the details.
There are two major differences between the semi and full auto receivers as far as barrels are concerned: First, the actual barrel trunnion on the semi has a smaller diameter passage hole for the barrel flanges than on the SMG. This prevent s the SMG barrel from simply being slipped into the trunnion. Second problem: On the front of the magazine well, inside the bottom of the receiver, is the feed ramp. On the SMG that is all that is there. On the semi there is a thick ring which holds the barrel in position to the ramp, but also prevents the larger rear diameter of the SMG barrel from being inserted. Since the SMG barrel flanges are of a larger diameter, you cannot use such a barrel in a semi.
You'd have a few options. You can have a semi 16" barrel cut and recrowned, have the flanges turned down on an SMG barrel, bore out the trunnion passage and remove the barrel ring on the feed ramp, or purchase a special length barrel from a supplier that is factory cut to fit a semi correctly. There are quite a few place that offer these barrels in your choice of length, but since you are ONLY interested in an education, I will not bother to mention the names of these companies.
I hope that this infromation was enough to answer your question and give the the education that you were looking for. By the way, you can simply register your UZI as a short barreled rifle and then you can put in ANY barrel of any length that you choose.
Mark T. Christian0
Please sign in to leave a comment.
Comments
2 comments