ryridesmotox Posted January 29, 2017 Share Posted January 29, 2017 (edited) Well, shooting a match today, I notice about half way through that the rear sight is sliding laterally in the dovetail... Screw it, finish the match, go home to fix it. In case anyone runs into the problem in the future, let me give some help... You're going to need a flat head screwdriver. Optional is a punch to remove the pin from the front of the rear sight. A 1.5 metric (what I used) Allen key. Grease, and a sweet high tech smithing block to drive the pin out without hitting the table. You don't need to take the top of the sight off... I did because, well I did, who cares. There is a spring in there so use caution and do not lose it or you're sight is worthless until it is replaced. Unscrew the elevation screw (on top of the sight). If you want to get the elevation close again, mark the sight. Luckily I scratched mine with the screwdriver so the mark happened to land in the right place... Yay. It will help if you press down on the rear of the sight to take pressure off the screw and detent. Mine was installed by Hercules. Eventually you will get this... Notice the spring in front of (toward barrel) the screw. Also, screw is directional, there is a fat side and a smaller side (at least mine was). If it falls out, put the larger diameter coil back into the sight. You will see two small Allen screws... Yay! You have arrived at the reason your sight is not fastened anymore. We have several options. I prefer not to use locktite on tiny screws like these. So, loosen the screws and slide the sight out, grab a non marring punch and a hammer if need be. Then get some vibratite, and put a bit on the dovetail or on the sight, and drive that sucker back in. The vibratite (or green locktite) should help hold the sight even without fasteners (I did this to my front sight as well). Tighten the allens, don't get all western on these suckers or you will strip them. Just tight enough with the short end of the Allen key Lastly, grab some aeroshel or other suitable grease and get it on the elevation screw, and on the detent area. Trust me, it's not going to make the elevation screw turn like butter once you get the sight elevation set. But I've had mine apart twice and the first time, I did not grease it, it was a bastard to get out again. Set elevation, you're done. Go confirm at the range. Edited January 29, 2017 by ryridesmotox Link to comment Share on other sites More sharing options...
johnbu Posted January 29, 2017 Share Posted January 29, 2017 Wierd. I just about needed a 1" impact wrench to power the sight pusher to remove my rear sight when swapping over to a CO configuration! That was with the Allen screws removed. Link to comment Share on other sites More sharing options...
ryridesmotox Posted January 29, 2017 Author Share Posted January 29, 2017 Really? That's nuts... The screws on mine were slightly loose and it started sliding... Noticed as I was waiting for the classifier... The mother F*©king classifier... Why... Always... The... Classifier?????????? Seriously Link to comment Share on other sites More sharing options...
johnbu Posted January 29, 2017 Share Posted January 29, 2017 I'm also "classifier cursed". "What can go wrong will go wrong... twice during a classifier!" The sights on mine couldn't have been hammered out. Seriously. Link to comment Share on other sites More sharing options...
bigbob21 Posted January 29, 2017 Share Posted January 29, 2017 Mines comes loose too... right now there's some slight wobble to it if you touch it...And the elevation screw, omg... it's backed out on me multiple times... I'm about ready to lock tight it.Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
ryridesmotox Posted January 29, 2017 Author Share Posted January 29, 2017 (edited) Wonder if your detent nubbin is worn off... I wouldn't locktite the elevation screw. Perhaps a lock washer of appropriate size. The spring might also need to be replaced. It provides tension against the screw so the detent interacts with the screw. The bottom of the screw should have little recesses for the detent to hold to. When you adjust elevation, you SHOULD, be able to see the rear sight bounce up and down as the screw pushes against the detent. If it doesn't do that, something is amiss Edited January 29, 2017 by ryridesmotox Link to comment Share on other sites More sharing options...
ryridesmotox Posted January 29, 2017 Author Share Posted January 29, 2017 18 minutes ago, johnbu said: I'm also "classifier cursed". "What can go wrong will go wrong... twice during a classifier!" The sights on mine couldn't have been hammered out. Seriously. I'm finishing up the last of my factory ammo before I get into my reloads, and I hit a few that didn't have primers seated deep enough. Lol... I was like, oh damn, it's going to faikboat the classifier. In going to have to throw carteridges at it Link to comment Share on other sites More sharing options...
MemphisMechanic Posted January 29, 2017 Share Posted January 29, 2017 15 minutes ago, ryridesmotox said: I'm finishing up the last of my factory ammo before I get into my reloads, and I hit a few that didn't have primers seated deep enough. Lol... I was like, oh damn, it's going to faikboat the classifier. In going to have to throw carteridges at it Just keep a ballpoint pen in your pocket. If the gun goes down, holster it and run downrange. Use the pen to poke two holes in each target, then begin kicking the poppers over one by one. Yell BANG as you do so, so the shot timer can log your splits. Link to comment Share on other sites More sharing options...
johnbu Posted January 29, 2017 Share Posted January 29, 2017 I would class higher doing that.... sad. Link to comment Share on other sites More sharing options...
ryridesmotox Posted January 29, 2017 Author Share Posted January 29, 2017 I would class higher staying at home and playing with my dick. Seriously... Today was not my best day. But it was fun. And these targets don't shoot back Link to comment Share on other sites More sharing options...
taxil343 Posted January 29, 2017 Share Posted January 29, 2017 I checked this when building my slide and luckily mine is super tight like John's. I say luckily, may be a serious PITA if it ever needs replacing. Link to comment Share on other sites More sharing options...
ryridesmotox Posted January 29, 2017 Author Share Posted January 29, 2017 (edited) I would rather have too right of a fit. Honestly, I was so pissed when I first saw it, I almost threw the gun in the trash at the range. The tanfo manufacturing tolerances are completely asinine. There is no logical explanation why a gun manufactured in the last 20 years should have tolerances this off, and I'm not talking about just the sight dovetail. Hammer spring pockets out of spec, trigger bars that look like they'd we machined with rocks using the flint snapping method, short chamber throats, front sight dovetails, sear cages WAY out of square, the list goes on. I used to machine for a guy who did DOD stuff. You would get a schem for a single part. Not even the whole apparatus. And it had to be within .0001 of an inch. This was, 15 years ago. And he didn't have the best equipment. He just knew exactly what he was doing. Tanfo need to handle some shit. Edited January 29, 2017 by ryridesmotox Link to comment Share on other sites More sharing options...
bulm540 Posted January 29, 2017 Share Posted January 29, 2017 (edited) Had the same problem a couple of months ago. I removed the sight and cleaned the dovetail real well and put locktite in the set screw. No problems so far. Edited January 30, 2017 by bulm540 Link to comment Share on other sites More sharing options...
ryridesmotox Posted January 30, 2017 Author Share Posted January 30, 2017 There really should be a dimple in the top of the slide so that the set screws have something to sink into. But knowing tanfoglio, they would machine a hole through the earths crust, throwing us off axis, and sending us spinning into the depths of deep space, just to try to machine 2 dimples for 2 tiny set screws Link to comment Share on other sites More sharing options...
MemphisMechanic Posted January 30, 2017 Share Posted January 30, 2017 My sight came loose once and I applied red loctite and have been keeping an eye on it. When I intiially installed it my bottle of red had dried up, and I forgot to apply it before shooting it twice. If it comes loose again, I'm making a short divot where it lands with my drill press. Link to comment Share on other sites More sharing options...
tedahlenius85 Posted January 31, 2017 Share Posted January 31, 2017 Anyone know what the dovetail measure on these Tanfos? Is it .359 and 60 angle? Link to comment Share on other sites More sharing options...
ryridesmotox Posted January 31, 2017 Author Share Posted January 31, 2017 I'll measure mine when I get home from work... If I remember. Link to comment Share on other sites More sharing options...
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