Which grip frame is this?

[andyo5]

Gun is a new .357 stainless New Blackhawk Flattop with a 4 5/8" barrel.
Also, it is unclear as to the weight of the gun. The website lists it at 46 oz., while the same model in blued steel is listed at 36 oz, and the 5 1/2" model at 40 oz. This does not seem to maker sense.
Thanks.

 

[andyo5]

Well, I saw the 'grip frames explained' thread on Ruger smithing.
Looks like it is the XR3 frame.

 

[Sugar River]

Correct. Also the blue Blackhawks have AL alloy grip frames which accounts for 5-6 oz of
difference from the steel framed guns.

 

[andyo5]

Correct. Also the blue Blackhawks have AL alloy grip frames which accounts for 5-6 oz of
difference from the steel framed guns.

Thanks.
But that still doesn't explain why the 4 5/8" stainless flattop is rated at 46 oz, while the 5 1/2" stainless flattop is listed at 40 oz. That can't be right.
Plus, both 5 1/2" Blackhawks (stainless and blued) are rated at 40 oz.

 

[Sugar River]

Blued Flattops are all steel, so weigh the same as stainless. The protected sight blue BHs have AL GFs.