The HK USP-SD is the 9mm version their tactical line of USP pistols. It has several features the standard USP 9 not have. However, it also lacks some features of its tactical big brothers. The following features are added the SD model and are n… more »

CCI has a very wide variety of .22 cartridges. I recently picked up a brick of CCI quiet-22 to see how it performs. There are many .22 cartridges out there that boast being "hearing safe." more »

The difference between machine guns and sub-machine guns, examples, and details. more »