Williams makes diopter (peep) sights for airguns. I believe these were origninal equipment on older Beemans and Crosmans.
https://shop.williamsgunsight.com/ecommerce/p/5dairguns-ag-070809
Another vote for the Williams peeps. I have this model with the click adjustments and target knobs on my HW35K. Really like it and will most likely get another one some day.
https://shop.williamsgunsight.com/ecommerce/p/fpairgun-ag-014168
Williams are out of stock but I have one NIB It’s model # 70809 no finger knobs !
@teleamp Are you keeping the muzzle brake on the R7 and adding the brass bead front-sight to it ?
@airmojoIt might go that way if I cant get the muzzle brake off... If that happens, I'll drill and tap it for a sight post.
Got to get some metric Allens.
If I can get the brake off and the front sight dovetail is in good order, I'll find something...
Meanwhile, I'm having a blast with the cheap glass.
@teleamp Quite often when installing a muzzle break, the front sight barrel groove has to be filed a bit to get the break to slide over it.
My R7 that I bought used, had a muzzle break on it (forget what kind it was) that had the filing done to it... I replaced that break with a Jim Maccari muzzle break that was longer (6 inches)... looks better and nice for cocking the barrel.
I hate the idea of having to file the front sight grooves down... especially if you wanted to go back to iron sights.
But I like using a scope more, so I'm happy with my R7... handy and fun air rifle to shoot !
The fore sight should still fit with the dovetail crimp filed down.
The recommended iron "sight" is for a pistol. Probably won't work unless you want to hold your rifle at arm's length like a handgun. Why not use an original Weihrauch rear sight? Is your pivot block not drilled and tapped? If not I would trade the barrel/brake to somebody who doesn't want sights and prefers a scope without having the common "how do I fill these sight screw holes?" issue.
My 2 cents ain't worth a dime
@airmojo Hopefully, the I can fit something like the Ruger 10/22 front sight.
The problem with putting a front sight on a muzzle brake is that it raises the sight higher than it should be and then you often have to find a way to elevate the rear sight so it is the appropriate height to work with the higher front sight.
As far as that muzzle brake is concerned I don't think you'll have any trouble removing it, unless someone has used something like Loctite to glue it on, lol. And even then a little carefully applied heat should take care of that. But IIRC, your particular R7 has the ribbed Beeman brake on it. (Mark offered it to me before he listed it on the classifieds here. Should have taken him up on it, but my loss was your gain. ?) Those came with a shim to fit the smaller barrel diameter of the R7 so there shouldn't have been any need to do any filing on the barrel so it would fit. And besides that, if I remember right those older R7s like yours used a front sight that had a cross cut dovetail on the barrel, like a powder burner sight uses. Not the dual dovetail grooves like later HW front sights use, so it shouldn't have needed any filing at all.
I have a R7 with no sights and want to use open sights. The gun has a muzzle beak on it... I will put some type of post on it, personally, I like brass beads.
I thought some of the forum members here were already reporting the use of SeeAll open sights with some good success.
I'm not sure if your brake would cause visual interference or not. I suppose some of that depends on how large in diameter the brake is.
I've never tried them, or even seen them in person. There are some videos on YouTube, though. I think there's more than one model from which to choose. So, I'd do some reading homework before I purchased one.
Here's one link. It has a picture of one to see:
https://airgunwarriors.com/community/airgun-talk/seeall-open-sights/#post-36309