I have the '325 Plus Nightguard', my name for my Governor. It's larger SS cylinder and slightly larger Al/Sc frame add a whole 7/8" OAL and a whopping 1.8 oz mass to the 325NG. It also has a tritium Night Sight and fixed rear sight, like the 325NG. I bought it 6/11 to shoot .45 ACPs from as a bedside gun - and because it was $300 less than the best 325NG price I had found. Yeah, it's not as persnickety re ammo... it'll also take .45 Schofield, .45 Colt, and 2.5" .410 shells.
Okay, I don't have a 'Night Guard'... but it's close enough for me! I bought three different boxes of .410's that first week to 'try' - somewhat fun - still have some - never bought more .410s. It shoots coincident POA/POI from 7-12 yd with .45 ACP ball ammo and 250gr Speer Gold Dots in .45 Colt. A great plus - it came with 1/3 mooncliplets - and uses the same moonclips as my 625JM. Another plus... it's still in production... the Night Guards are
gone!
Stainz
PS I put the OEM grip back on my Governor - the .500 Magnum Hogues aren't really needed with .45 ACP/.45 Colt loads.