Mossberg 500A 'Breacher' 18" barrel, 5 round capacity, integral standoff device, pistol grip, $395.

Breacher with Choate side folding stock installed, $510.

Breacher with Choate folding stock open. Having a stock creates a more solid firing platform.

Installing a standard fixed stock also can improve control greatly - far more than pistol grip only.

Mossberg 500A 12ga 18" barrel, 5 round capacity, $375.  Also available in 20ga, $375.

Mossberg 500A Mariner 12ga 18" barrel, 5 round capacity, $495.   

Remington 870 HD 12ga 18" barrel, 7 round capacity, $395.

Remington 870 Marinecote 12ga 18" barrel, 7 round capacity, $745.