m303I completed this course in 2016 and achieved a grade 2 pass. It's a very tough course, in my opinion. You should have completed M208 (or its equivalent) recently prior to starting M303 inPHI M303 630 Mortise Lock Body, 03 Function, Satin Stainless Steel Finish. Product Type: Exit Device PartAccessory. Model: PHI M303 630 LHR, M303 630 RHR. PHI_Precision-2000