I talked to Zeus this morning and we were discussing lengths of ejector rods and how far they would extract brass. I took a few pics to illustrate the differences. First is a OM 45 conversion with a 5 inch barrel and the same length ERH. Secondly is a OM 45 4 5/8 barrel and stock ERH. Lastly is a Bisley 5 1/2 barrel and a ERH of that length. The differences are the Bisley and conversion have #5 base pins and the OM 45's is stock. The #5's are just a bit shorter.