The GLOCK 20 Gen 4 pistol is full size for maximum capacity and performance, chambered in 10mm AUTO. 
The SAFE ACTION® System is a fully automatic safety system consisting of three passive, independently operating, mechanical safeties. All three safeties disengage sequentially as the trigger is pulled and automatically re-engage when the trigger is released.
 
Sellers Notes:
 
This Glock came out of a Glock Collectors Collection, this gun is Un-Fired and was stored in the case. It comes with 3 15 round magazines, the Glock mag loader, and the factory case. Condition is 100%, there are no flaws on this gun! We had to wipe the Glock oils off of the slide, he purchased the gun new and never operated it or took it out of the case.
 
Specifications:
 
Caliber: 10mm Auto
Barrel Length: 4.61"
Frame: Polymer
Front Sight: White Dot
Rear Sight: White Basket U
Optics Ready: No
Finish: Black
Color: Black
Safety: Trigger Safety
Capacity: 15+1
Magazines: 3 Included
Best Uses: Target/Personal Protection/Duty Weapon/Bear Gun
Action: Striker Fired
Hand: Ambidextrous
Model: PG2050203
UPC Number: 764503802034
Note: Glock has Discontinued this model.