Per the Winchester Model 21 manual, you assemble with the hammers down. Apparently, Winchester preferred to have the tension off all springs when being stored for extended periods of time. Sorry for the poor scan.



That being said, I normally don't. Like stated above, it is much easier to attach the forearm with the hammers cocked. I have not tried Don's method, but I will.

The only other sxs I have any experience with is the L C Smith. You definitely want the hammers cocked before attaching the forearm. In fact, if you forget, cock the hammers by one of several ways before you attempt to attach the forearm or you could break something.