1377 sight adjustment question

[kar120c]

I have a 1377 equipped with LPA Mim rear sight and to make it shot accurate I must adjust the sight almost all to left, not only the adjustable part part of the sight but the mounting plate too.
I thought it waf due to the stock plastic front barrel band, a little bended, but yesterday I upgraded it with the machined aluminium Gmac part and the resulti is the same. My 1377 is very accuarate but only after adjusting the rear sight all to left.
Is this normal on a pistol like the 1377, where manufacturing is not at top?

[BillK]

I have had some 13xx & 22xx that needed a lot of sight adjustment.  Probably more of the 13xx pumpers because the steel breech does not fit the smaller 13xx tube as well as it does the 22xx tube.
So, not a big deal is the gun shoots straight after sighting in.