Have an AR-15, M-16 or AR-14 and want to convert it to 9mm? Just get this kit and add a 9mm barre. Used Kit includes Hahn precision 9mm Colt AR magwell conversion block (bottom loading - 100-000-443WB - retails for $200); CMMG MK9 Colt AR 9mm bolt/carrier (CMMG90BA4AD - retails for $175); 5 ASC 32rd 9mm Colt magazines (4-862 - retails for $20). NOTE:no ammo included The hahn block and bolt are the most reliable of all the colt straight mags conversions I've tested; only selling because upper was re-used for a project, no need for 9mm ar. Asking price for used kit - as is: $415; fee free to make a reasonable offer.