I saw this in sportsmansguide.com or on page 11 of the catolog

Can you put these guns together and shoot them and how hard are they too do this?

or have they been "de milled" where they can't fire?

Heres the ad

Used Israeli Military Uzi Spare Parts Kit ... a genuine Real McCoy

No knock-off here. This is an original Uzi Spare Parts Kit directly from the Israeli Defense Forces...not look-alike parts made in Belgium or South Africa.
Kit includes these receiver sub-components:

Barrel mount
Ejector
Rear sight base and stock mount
Grip mount lug
Front sight base.
Condition: used, in good to very good shape. Weighs 8 lb., 2 ozs. Order ONLINE today!


Used Israeli Military Uzi Spare Parts Kit

anyone?

OK greg since no one else is jumping in, here's my pointy-headed perspective.

You can't make this stuff into a gun because the parts are from a machine gun and you can't make a machine gun legally.  You can't make one of these into a semi-auto because a "real" Uzi submachine gun fires from an open bolt and therefore the semiauto versions made by IMI, Vector and Norinco, which fire from a closed bolt, are dramatically different in a number of significant ways from the real subgun.

What you are getting here, I believe, is the entire gun, including a receiver that has been demilled by cutting it into pieces.  It would be useful as spare parts if you had an Uzi submachine gun, and I suppose you could build a replican "non-gun" out of it if you were so inclined (and so skilled).

Hope that helps . . .

Oh, and you're welcome for all this wonderous information.