RUGER Model:  57 
Caliber:     5.7X28MM
Finish:     Black Nitride
Action:     Striker Fire
Sight:     FT: Fiber Optic RR: Adjustable / Optic Ready
Barrel Length:     4.94
 Overall Length:     8.65
Weight:     24.5 oz
Capacity:     20+1  (10+1 in NJ)
# of Mags:     2
Safety:     Ambidextrous Manual Safety
Features:     

1913 Picatinny Rail, Robust Slide Release;
Reversible Magazine Release

$629.00 is a Spl price - Taking Pre-Orders on the New Ruger 5.7

Ref. 

#16401 = (2) 20 rd mags

#16402 = (2) 10 rd mags

Delivery as soon as Ruger releases orders..............

57, 5-7, 5.7, 5.7x28, New Ruger