replacement barrel question

[Thor]

And remember, if you are putting a 6" barrel on a Luger that has the Navy two position sight you must have the higher front sight block or the Luger will shoot REALLY high, like over the target board at 300 meters. Many 6" barrels are set up to work with the stardard rear toggle sight so it really helps to make sure the barrel you are buying will work with the rear sight set up you have.