I had to replace my hammer on my Essex Arms 1911 clone. I'd put the old GI hammer up on the milling machine and tried to machine the hammer hooks down to .020" unfortunately the mill had other ideas and by the time I got done the hooks were closer to .015". The gun gurus all say to not cut your hammer hooks lower then .018". And this was unsafe. The thumb safety wasn't working right so I ordered a Wilson Combat Spec Ops 9 trigger off of Ebay. The Spec Ops 9 was the only spur hammer Wilson had in it's line up. All the rest were Commander burr style hammers. I've never had any trouble with spur hammers although several of my 1911's are set up with Commander hammers and a few of them have the beavertail grip safeties too. After I got the new hammer installed I was dry firing it a few days later and a 1/4" piece on the top of the hammer broke off! I was totally amazed at this because Wilson has a most excellent record for good quality control on their products! From my experience as a tool and diemaker this hammer was either not drawn at a hot enough temperature or was taken out of the draw oven too soon. That makes it too hard prone to breakage.
