I have Lothar Walther factory length .177 and .22 barrels at 14.5". I also
have a factory length .177 at 10". All have the flat spot for the friction
fit front sight.
LW barrels milled to fit the 10-pump
guns (1322, 1377, P1322, P1377) are here.
Looking for a complete-package longer barrel kit for your 1322 / 1377? You
need the LW Big Boy Kit.
They are all 7/16" OD and thus fit the standard plastic
and steel breeches and all are rifled, obviously.
The 14" barrels can be cut down and recrowned at any length.
Dimensionally, they are basically identical to the Crosman manufactured
barrels, but made by LW themselves for increased accuracy and performance.