I am considering buying this conversion and was wondering if any one had some comments on it Pro or con. Also I was told you can modify UZI mags to function in it . How is this done??

Yo cave dude
  I bought a 9mm upper fro FAC. its 485.00 and no mag block like asa.I ordered one from asa and canceled as the kept calling and getting my c/c # wrong. Plus they don,t tell you in the add that  you need the $150.00 mag block and the $90.00 buffer to make it work. Olympic has no mag block and it uses sten mags with just a 7/8 inch square channel tacked to the back. i,ve made 6 already with $4.00 sten mags .they work great and you can shoot it at the indoor range as its pistol CAL.oOlmmpic has them in 9/10/40 and 45 cal for 539.00 retail. its still cheaper this way, and they shoot great.
         ammo1015 (call sign lease breaker)

BTT   More input please