Pix.
The peep sight is a WGRS (Williams Guide Receiver Sight). The rifle's an Angle Eject and the sight mounts to 2 existing holes on top of the receiver. No drilling and tapping needed. The hammer extension is stock, and it's mounted on the left side. The front sight is stock, for now, but will likely be replaced with a Wiliam's FireSight unless I mount a red dot first. The rear sight slot filler is a William's black aluminum one with a set screw in the middle. I found out I can get a profiled steel dovetail slot filler from Ranger Point Precision (RPP). That would look a lot better, so I need to see what other brands are available. The magazine tube was cut down to a half-magazine by yours truly. I measured 4 44. Magnum cartridges laid end to end, cut that much off the back of the tube, and put it back in. That gives me a 5-round tube instead of 9. If I can't hit something with 6 shots, I probably can't hit it with 10. The magazine cap is held by the same screw in the same hole as before, since nothing on the front of the magazine has changed. The sling swivels are Uncle Mike's, at least for now. I may go with QD swivels like all of my other long guns, but it's not a high priority. The buttstock shell holder has elastic loops for 9 more rounds. I replaced the saddle ring with a plug screw. Other than taking that off, mounting the peep sight and cutting down the mag tube, it's basically a stock 1894-1994 Model 94AE saddle ring Trapper carbine with the dates engraved on the right side of the receiver.
Turnbull Restoration makes a Red Dot Mount for Winchester Model 94 and 1892 Receivers with a Docter/Noblex footprint. It's compatible with Vortex Venom, Vortex Viper, Burris FastFire 3 and a bunch of others. They make a Red Dot Mount for Winchester Model 94 and 1892 Barrels with the same footpint. I wanted to get one and put a FastFire 4 on it, but I have a couple of spare red dots, and would rather use one of them. They make a Red Dot Mount for Winchester Model 71 and 1886 Receivers, too. They made a mount for Winchester Model 94 and 1892 Barrels with a Trijicon RMR mounting standard, but quit making it. They aren't likely to ever make a mount to fit my SIG Romeo and other red dot sights that share the Aimpoint Micro mounting standard, but may make a Picatinny Rail barrel mount sometime. If they do, they'll let me know. I'm not sure I want a dot on an adaptor to fit the rail. That adds an extra layer of height and complexity.
https://rangerpointstore.com/rifle-barrel-3-8-dovetail-filler-blanks https://www.turnbullrestoration.com/red-dot-mounts/