This will give you a place to start. I have a HW97K, a relative of your HW77.

Weihrauch 77 with Diopter sight

I first saw a model 77 with the Diopter sight on the rimfire central forum for air rifles. I don't want to return there to go digging through all of the posts to find the guy, so I'm just going to ask here if anyone owns one of these? I'm awaiting price info from Krale, who would have to order...

www.airgunnation.com

 

I recently got a HW95 and wasn't happy with the irons so invested in peep sights only to find out as I shot it more, they weren't correct either. Unless you are shooting at a single distance.
I finally decided on a Hawke scope with a Mil dot reticle so I had solid hold over and hold under points. now I can be very accurate at any distance I am willing to use it on Varmint. (write your dope down and keep it with your rifle!)

 

Thank you OldWolf! That thread gave me plenty of info!

milkroute, what peep sights did you try and didn't like? I shoot at 25 feet, 10 meters, 50 feet and 25 yards. I print my own targets scaled down (or up) from official ones.

 

The Williams FP-AG-TK peep will work nicely with the standard HW globe. It's not a match diopter sight, of course, but still a good choice for general target work. I use the Williams on a couple of my HWs.

 

Check out the AirForce TS1 rear sight, a lot of sight for the money.

 

I removed the front sight on mine, actually had to take it to a gunsmith as the screw holding it was so tight I could not get it loose, probably my inexperience and lack of a proper tool. I used I think an Anschutz front globe sight and an Anschutz rear diopter that was designed for the 11mm grooves. I had a HW97 with the thumbhole stock which I did not care for so orderd a Tyrolean stock from Customstock.com. When it came in I swapped the HW 77 stock to the 97 and put the Tyrolean on my HW77. With the diopter sights it is absolutely perfect.

 

Thank you all.

gcrank1, the AirForce sight looks really great!

 

I have the 97K, no provision for sights, if mine was a 77 Id already have one of those on it and start working out what front IF the oem doesnt sit right height.

 

Unless they've changed the 77 since I had em, the front sight is a bolt on square post... a mounting block for a dovetail globe could be machined to fit though...

 

It is bolted or screwed on. I actually had to take mine down to the local gunsmith to get the screw removed. It had been factory loctited so tight I could not get it out. After removing it has a 8mm dovetail and I think the globe I put on is an Anschutz. My rifle is less than a year old, so current model

 

Iirc, I read about an HW dovetailed sight block that is a direct, and inexpensive, replacement (on an air-gun forum).

 

Guess that's a new improvement, and a wise one, adding the dovetail. The few examples I owned, back in the 90's, had a smooth block that was threaded for the post, sans dovetails.