Which Lyman 57 receiver sight is for the T/C Hawken? Is it the 57GPR or the 57SML? Anyone know for sure?

Bronko...

It's the one that doesn't have to be installed by a gunsmith.

BPS

The SML is the one you want.


heres the instructions:
The 57 SML aperture sight is designed to fit the Lyman Trade Rifle, Lyman Deerstalker
and those of similar design such as the Thompson/Center Hawken.
INSTALLATION ON LYMAN TRADE AND DEERSTALKER RIFLES AND SIMILAR GUNS
The Lyman Rifles are predrilled and tapped for the 57SML. Thompson/Center
Hawken require that one hole be drilled and tapped for the enclosed 8/32 screw.
To install the sight:
1. Remove slide from sight base.
2. Unscrew rear tang screw.
3. Place sight base on tang (still in stock) and attach it using the rear tang screw.
*4. Mark center of front hole and drill with No. 29 drill. (Removing the tang and
clamping it in a vise will protect the stock of the rifle during the drilling operation.)
*5. Tap hole for 8/32 thread.
6. Secure sight base to tang with tang screw and 8/32 screw.
7. Replace slide.
Installation complete.

BPS - I ain't worried about that anymore. I got my own tap and die set now and I've already drilled and tapped 2 tangs for the receiver sights. Both jobs came out perfect.

Bronko...

We were all rooting for ya because we all knew ya could do it!

BPS