If it stays on and locked during inspection arms and while stacking arms, I would consider it adequate. The fit between repro muskets and bayonets is problematic. But realistically, we don't use bayonets for their orignal purpose, and rarely, if ever drill with them vigorously. (If you feel your bayonet is not really adequate for abyonet exercise, you can simply opt not to fix it.)
Pine River Boys, Co I, 7th Wisconsin
"We're... Christians, what read the Bible and foller what it says about lovin' your enemies and carin' for them what despitefully use you -- that is, after you've downed 'em good and hard."
-Si Klegg and His Pard Shorty