Muzzleloading Forum

Help Support Muzzleloading Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

POLL: Are the stock Lyman GPR adjustable rear sights reliable?

  • No.

    Votes: 2 28.6%
  • I havent had any luck with them.

    Votes: 5 71.4%
  • I don't own a Lyman GPR, but I've heard...

    Votes: 0 0.0%

  • Total voters
    7

Are. M.

NC NMLRA Field Rep, NRA ML Instructor
MLF Supporter
Joined
Dec 8, 2019
Messages
524
Reaction score
543
Location
Johnston Co., NC
Of all the great Lyman products out there, why would they ever put those trashy stock sights on such a fantastic rifle?

The Problem:
The rear sight is too wiggly and that front sight is just huge and flat. Like a big stupid hunk of 2x4 out there on the end of the barrel.

Not a fan.

The Trek:
I replaced those stock sights with the Lyman 57 GPR and the 17A Globe target sight combo. I even picked up the dovetail lug for the rear sight just because. These sights are not cheap but are awesome and do everything target sights ought to do. The gun practically aims itself. Those sights, however, are not regulation for the kinds of aggregates I want to shoot in.

So after a little googling, six days S&H, and some light finagling, I was able to tap in these replacements from TOW.

The Solution:
Lyman Semi Buckhorn
https://www.trackofthewolf.com/Categories/PartDetail.aspx/881/1/RS-LYMAN-GPR
-and-

Target Front Sight
https://www.trackofthewolf.com/Categories/PartDetail.aspx/874/1/FS-CA-1I
The rear sight tapped into the .337" dovetail no problem, and I knew the front sight at .375" was not going to fit. After 6 or so minutes of carefully filing the bottom of the sight base I was left with a snug fit on that front sight. File only the bottom of the sight base and not the dovetail on the barrel. Do what you want with your own gun, though. I don't care. I also wound up slotting the rear sight notch deeper by approximately .05".

In Conclusion:
The sight picture is so much better than those trashy stock sights. The new narrow blade combined with the deeper slot makes all the difference in the sight alignment/target acquisition (for me anyway). It's almost as good as the peep, and at a quarter of the price of the target sight setup, really can't be beat.

Mine wound up shooting 6" low at 50yds, but that was easily fixed by filing the front sight down incrementally. The shiny steel made some prettt gnarly burs, so be sure to take those off or they'll get in the way of a good sight picture.

Smokily yours,
RM


TLDR:
These work great. File the bottom of the front sight base til it fits.

Lyman Semi Buckhorn
https://www.trackofthewolf.com/Categories/PartDetail.aspx/881/1/RS-LYMAN-GPR
Target Front Sight
https://www.trackofthewolf.com/Categories/PartDetail.aspx/874/1/FS-CA-1I
 
Back
Top