This handgun is the Sigma series Smith & Wesson .40 caliber. The Sigma series is ergonomically designed. The 18 degree handgrip allows you to raise the weapon so that you are aiming straight every time. They say that aiming a S&W Sigma series handgun is as easy as pointing your finger.
The Sigma series is available in either 9mm or .40 caliber. The one pictured above is the .40 caliber. The ammo capacity of the .40 caliber is 14+1. There are different schools of thought on what ammo to carry in this, but it seems like the general consensus is that the 180 gr may not be all its cracked up to be for muzzle energy and that you can get just as good if not better with 155 gr. One of the recommended rounds to carry in this gun is the Remington 155 gr. JHP.
Now all you need is the sign that says, “This house guarded by Smith & Wesson”.