I have one Olympic 9mm upper assembly, complete with bolt/carrier and charging handle )CH has a purple tint to it). The barrel is free floated. Also includes a SOCOM mag block and eight, new, 32rd Sten mags, four of which have been modified to be used without the mag block (you can remove the installed adapters and use them with the SOCOM mag block if you like it better that way). Front sight tower has a KNS cross hair sight in it. I liked this setup, as it made it quick and easy to acquire targets and put bullets on an exact aiming point. I will also include an A2 front sight post with the upper, in case you don't like the KNS like I did. The rear sights are A1 style with an A2 aperture. Round count is under 500, I bought it "as new" and it looked that way. I put about 200 rounds through it, testing the function and playing with the KNS sight.This configuration can be installed directly on your .223/5.56 lower without the need for a 9mm hammer, buffer, etc. Pin it on and go!!Asking $550 for everything pictured.
A pic of what the KNS sight looks like: