Smart Rest Picatinny + Arca Adapter All In One Clamp Flyfishing Accessories NTRODUCING THE SIMMS FLYWEIGHT COLLECTION NTRODUCING THE SIMMS FLYWEIGHT COLLECTION The new Flyweight Collection is a fully featured fishing system that bends tradition in favor of faster The rock solid Apex Frame design allows quick adjustment and smooth panning to keep heavier rifles on target and rock solid from low sitting positions to nearly six foot high standing positions Attach this adapter to the Arca Clamp on tripods pan and tilt machines and any arca clamp to create a quick release adapter which can clamp an Arca Rail as well as a Picatinny Rail