Good morning gentlemen and Happy New Year. I spent the day at a friends for a great New Year dinner and to check out his S&W M29 collection. He also has an early 1927A5 with a low serial, #131. No P suffix. The finned barrel measures about 15". No provision for attaching a butt stock. I've read some of the pistols lack the suffix, so what manufacture date list would we use? One will be '75, the other '77. No big difference either way. Another question is that the vertical fore grip mount (metal tab that extends from bottom of barrel) is lose. Can this be easily tightened? What supports the front end of the grip, as it doesn't touch the underside of the barrel? Thanks for your help in advance.