Gentlemen,
I have owned something from Loyalist, Middlesex, and Discriminating General. My personal experience is:
Loyalist arms I liked. Wood was good, trigger pull not bad, fit pretty good. I had an 1842 musket (wish I never sold it) and an EIC pistol (love it).
I had a blunderbuss from Middlesex. Never fired it, but would not have been afraid to- however, fit and finish and trigger pull didn't compare to Loyalist.
DG- I had a dog lock from them. Horrible wood color, horrible trigger pull. Did not think it was of the quality of the other companies.
Others may have had different experiences. I have no intention to be disrespectful to anyone or their opinions. Some like them, some don't. I think they are generally safe, but I would put Loyalist above the others I have seen/owned.
Respectfully,
David