The Williams Fire-Sights are anodized aluminum alloy, so your magnet will not stick to them either. They will have Williams stamped into the left side of the rear sight base. The reason I asked is because I would like one of the 24" barreled versions for my son. The plastic ones have a very long rear sightr ramp and are easy to tell they are plastic.
Some guys use the Veri-Flame, but you are still stuck with the factory plug, tool, primer carriers, and blowback. I have the .25 ACP plug, it has a hex head for easy removal with a socket, and almost blowback free. I get a very small amount of soot (little ring) on the standing breech at the back of the case. WARNING: Once you try the .25 ACP, you will be spoiled for life. I tried the new Win 777, Rem Cleanbore, and Win ML primers last fall, never again. Gave my 209 primers away, just too messy after being spoiled.
If you already have a means of priming/depriming at your disposal, all you need is a .25 ACP shell holder. $4 if ordered through R&P below.
Here is a U. S. distributor of the PR Bullets and accessories, same prices but might be closer for shipping, says most in 2-3 days. R&P has free shipping on accessories ordered with bullets and additional accessories after the first one. R&P also sells priming/depriming kits too.
http://www.bpbullets.com/Precision Rifle Bullets.
http://www.prbullet.com/Busta, upon further review, the side of the sight is indeed stamped Williams and is aluminum after slight tapping it with a small brass hammer I am set up to reload rifle with RCBS equipment so I'll probably go with the .25 acp set up.
If you call Richland Shooters in Richland PA at 717-866-4246 they had two more SS Sidekicks w/24" barrel in stock. They will have to check for you on the Williams sight. I might have just lucked out on getting this. Could be the others don't have the latest sights.