And a heavy brute it is! I tried to remove the sleeve, as I found the rifle far too barrel heavy for my liking - it just doesn't seem to balance as nicely as my LGV with a similar sized sleeve. The sleeve on my MM would appear to be "glued" on - the front sight was removed, as was the set-screw, but the sleeve would not budge. I was told that applying heat (from a torch !) was the only way that it could be removed, so it remains on the gun.