.40 Caliber.
Included:
One full size grip, slide and barrel.
One subcompact grip, slide, barrel.
One fire control which works with either full or subcompact.
One ten round mag which works with only subcompact.
Six fourteen round mags which work with either full or subcompact.
Both slides have tritum night sights.
The fire control group changes from one to the other in sixty seconds.
Very good condition.
http://sigsauer.com/CatalogProductDetails/p250-2sum.aspx
$675.00