No
No
No. 9mm and .40 are not interchangeable.
The Walther P99 was developed by the gun manufacturer Carl Walther GMBH Sportwaffen. The Walther P99 was made in the year 1996 and continues to be manufactured.
No
No
The Walther P99 and the Walther PPK 7.65mm.
It will slide on to a newer p99 with the weaver rail (post 2004 i believe), but the notch is in the wrong place.
A 22 LR caliber pistol made by Walther, it is similar in design to the Walther P99.
A well-used Walther P99 AS (Anti Stress) handgun in 9mm/.40 S&W tends to fetch a price of $500 to $600 in today's market.
Ask a gunsmith for help. You can also download a manual at the Walther site.
$450-$550, depending on condition.