It is almost impossible to get the heat shield on without scratching the barrel a little. The usual installation is to remove the front bead sight and slide on the guard. Otherwise, one has to really spread the front of the guard open as much as possible, slide it over the thinest part of the barrel over duct tape with lotsa grease and keep your fingers crossed. They did have parkerized heat shields.
As for the bayonet I would stick with standard M-7* or stainless M-9 prybar. The M-10, which is real (though not great) carbon knife steel like the ubiquitous surplus M-7, is hard to find. My favorite bayonets, like the Marine OKC-3S and Army Special have a 1/16th of an inch longer handle and fit the rifles fine but are a little long/loose on the 20" shotguns.
*The M-7 "pigsticker" is cheap, better steel for a cutting tool than its replacement, and is nice and lite on the front of a gun -- find one of these I'd suggest.
Last edited by HockaLouis; 04-21-2013 at 05:25 PM.