The Franklin Armory BFSIII AR-S1 operates in various positions and is great for competition shooters, tactical shooters, and recreational enthusiasts alike. The BFSIII is manufactured with enchanced buffer springs for optimal flexibility, features a crisp trigger pull at 4.5 pounds, and has an audible reset on release. Another excellent feature of the BFSIII is the ability to release the next round in binary mode by simply switching back to position 2 in semi. This item cannot ship to California, the District of Columbia, Iowa, New Jersey, New York, Hawaii, Rhode Island, Flordia, Maryland, Connecticut, Washington, Oregon, Massachusetts.