I have been using my Norc M305s for the last year and a half. about 1500rds through it and only found a couple small (very fixable) issues.
-Roll pin for magazine release migrates. This prevents from the trigger guard rotating for removal or the trigger assembly.
-The sharp edges of the synthetic stock i fixed with a file and one pass.
Since these issues i couldn't help pass up the opportunity to pick up the slightly older M305 with the Walnut stock. synthetic M305 will receive an OD Achangel stock at some point.
Very beautiful guns for the price. you will not be dissapointed by it's performance