This is not the airsoft replica you'll see at Walmart or even at most airsoft stores. This is full blowback so the slide cycles back with each shot, and locks open on empty.
This is the GHK branded Glock 17 gen 3, licensed by Glock. The slide and barrel are CNC steel, unlike the more typical VFC/Elite Force Glocks which have aluminum/zinc slides and barrels.
Also, this uses a "striker" system a bit more similar to the real thing than the others which use an internal hammer. However, no parts of this replica can be converted to accept/fire any type of ammunition whatsoever.
The gun itself retails for $350 on evike, and the extra magazine retails for $60.
Asking $290, which means you'd save about $120 on retail. Also included is a speed loader for loading the magazines. Throw an extra $5 and I'll throw in a partially used bottle of green gas (which powers the replica).