Paul- The rifle is not bad sound wise which didn't make sense to me because of no baffles. I did try marauder baffles & also hatsan baffles but no go. The id. of the nova shroud is .8840, my marauder is ..7675 & my hatsan gladius is .8325. I have moderators on all my rifles except the marauder. On my gladius i just removed the shroud completely & put a weihrauch moderator on it. The marauder magazine does fit in the nova but it doesn't snap in like the factory mag so i would stick with the originals. I am sure that donny can make an adaptor for the threaded muzzle end but i shoot mine on low power & the sound doesn't really bother me. But i understand that sound affects everyone different.
The Nova Freedom is not regulated, but can be pumped after 5- 10 shots depending on the cal. to give similar results. Happy shooting to all and to all a good night