Sight question/new carbine

[shamrocks]

No milled angle between the front lugs?

See if the cut out inside bottom has a oblong ovaled look, like the Winchesters.

Really need better pics. Try macro mode.

CH-P777

Flat/straight between the front lugs. It just may be a Winchester. Under a loop, there is the bottom part of something like what is similar to the one you show above the W.....sort of like bottom part of a letter/crescent shape and what looks like 0 just under the slide release face and 88 in front of trigger guard.