http://www.jgsales.com/product_info.php/m/glock/p/glock-23-40s-w-4th-gen-black-pistol,-new-/manufacturers_id/29/products_id/5665?SID ATTENTION: The following locations have magazine restrictions; please check for your local law and regulations before placing an order.
California- No mags over 10rds without a high-cap mag permit.
Hawaii- No handgun mags over 10rds.
Massachusetts- No mags over 10rds.
Maryland- No mags over 20rds.
New Jersey- No mags over 15rds.
New York- No mags over 10rds made after 1994 (i.e. none marked Law Enforcement only).
Chicago-No mags over 10rds.
Washington DC- No mags over 10rds.
http://ag.ca.gov/firearms/dwcl/12275.php 12276.1. (a) Notwithstanding Section 12276, "assault weapon" shall also mean any of the following:(1) A semiautomatic, centerfire rifle that has the capacity to accept a detachable magazine and any one of the following:(A) A pistol grip that protrudes conspicuously beneath the action of the weapon.(B) A thumbhole stock.(C) A folding or telescoping stock.(D) A grenade launcher or flare launcher.(E) A flash suppressor.(F) A forward pistol grip.(2) A semiautomatic, centerfire rifle that has a fixed magazine with the capacity to accept more than 10 rounds.(3) A semiautomatic, centerfire rifle that has an overall length of less than 30 inches.(4) A semiautomatic pistol that has the capacity to accept a detachable magazine and any one of the following:(A) A threaded barrel, capable of accepting a flash suppressor, forward handgrip, or silencer.(B) A second handgrip.(C) A shroud that is attached to, or partially or completely encircles, the barrel that allows the bearer to fire the weapon without burning his or her hand, except a slide that encloses the barrel.(D) The capacity to accept a detachable magazine at some location outside of the pistol grip.
(5) A semiautomatic pistol with a fixed magazine that has the capacity to accept more than 10 rounds.(6) A semiautomatic shotgun that has both of the following:(A) A folding or telescoping stock.(B) A pistol grip that protrudes conspicuously beneath the action of the weapon, thumbhole stock, or vertical handgrip.(7) A semiautomatic shotgun that has the ability to accept a detachable magazine.(8) Any shotgun with a revolving cylinder.(b) The Legislature finds a significant public purpose in exempting pistols that are designed expressly for use in Olympic target shooting events. Therefore, those pistols that are sanctioned by the International Olympic Committee and by USA Shooting, the national governing body for international shooting competition in the United States, and that are used for Olympic target shooting purposes at the time the act adding this subdivision is enacted, and that would otherwise fall within the definition of "assault weapon" pursuant to this section are exempt, as provided in subdivision (c).(c) "Assault weapon" does not include either of the following:(1) Any antique firearm.(2) Any of the following pistols, because they are consistent with the significant public purpose expressed in subdivision (b):
MANUFACTURER MODEL CALIBER BENELLI MP90 .22LR BENELLI MP90 .32 S&W LONG BENELLI MP95 .22LR BENELLI MP95 .32 S&W LONG HAMMERLI 280 .22LR HAMMERLI 280 .32 S&W LONG HAMMERLI SP20 .22LR HAMMERLI SP20 .32 S&W LONG PARDINI GPO .22 SHORT PARDINI GP-SCHUMANN .22 SHORT PARDINI HP .32 S&W LONG PARDINI MP .32 S&W LONG PARDINI SP .22LR PARDINI SPE .22LR WALTHER GSP .22LR WALTHER GSP .32 S&W LONG WALTHER OSP .22 SHORT WALTHER OSP-2000 .22 SHORT (3) The Department of Justice shall create a program that is consistent with the purposes stated in subdivision (b) to exempt new models of competitive pistols that would otherwise fall within the definition of "assault weapon" pursuant to this section from being classified as an assault weapon. The exempt competitive pistols may be based on recommendations by USA Shooting consistent with the regulations contained in the USA Shooting Official Rules or may be based on the recommendation or rules of any other organization that the department deems relevant.(d) The following definitions shall apply under this section:(1) "Magazine" shall mean any ammunition feeding device.(2) "Capacity to accept more than 10 rounds" shall mean capable of accommodating more than 10 rounds, but shall not be construed to include a feeding device that has been permanently altered so that it cannot accommodate more than 10 rounds.(3) "Antique firearm" means any firearm manufactured prior to January 1, 1899.(e) This section shall become operative January 1, 2000.
The reason why the gun is illegal in some states is because of the magazine capacity size not because of the double spring feature.