For those of you who have the good sense to be a fan of the black pistol, Pearce Grip has finally released their +1 mag extensions for the slimline .45, & they're awesome!  I got mine from Ajax today (for $7.95 each) & they honestly look like a genuine Glock accessory.  The checkering is identical, unlike the Scherer products, & there's a little "plug" that fills the area to the rear of the backstrap & locks the extension into place.  A nifty little device, to say the least.  Happy shooting...