The SmartReloader SR5000 Modular Gun Vise assists the rifle owner with rifles, short and long. The “modular” part refers to the two rubberized clamps which can be moved to six different locations to accomodate different rifle lengths. The modular clamps do not require any screws to move.
Stability can be enhanced by anti-slip add-on pieces (two of a possible six are included) which can also be used to store parts, tools, etc. The SR5000 is made of “hard, durable plastic, resistant to chemicals and solvents.” It should be noted that the SR5000 does not seem intended to replace a vise that clamps to a table — it seems appropriate for light to medium weight work such as cleaning, sight installation, and part swapping.
UPDATE (5/29/13): Added the following stock pictures