When Hitler became the full power in the Germany in the mid-1930's, he'd began the preparations for the war. The development of the new pistole, to replace aging Lugers was one of such preparations. Carl Walther company began development of the new military pistole in mid-1930's, and in 1938 the Werhmacht (German Army) adopted Walther MP model experimental pistole as "Pistole 38". This excellent airsoft replica is now made by Maruzen. It's gas blowback, heavy, and functions identically to the real weapon.
Where to Buy
The P38 is available at just about all the overseas airsoft shops and a few US shops. Pricing is around $160.
Other Information Sources
Precision Airsoft, a US Dealer, Stocks this pistol.