The Harris 1A2-BR2 Bipod Sling Swivel Stud Mount allows the shooter to quickly set up on uneven surfaces and adjust the leg height without leaving their position. The Bipod is self leveling and just takes a simple twist of the locking mechanism to keep it in position. The 1A2-BRS uses a the 1A2 stationary base and in order to keep the legs fully retracted or ejected the locking mechanism must be tightened.