The SP1 is a woodsball/scenario marker, being released in the same lineup as the Vibe, EOS, and Ion XE. It is the Vibe's woodsball counterpart (it has 7 mounting rails on its body for flashlights, laser sights and scopes), in the same way that the SP8 is the Ion's counterpart. It is also limited to 11 BPS. It uses the same internals as the Vibe, but has two different shells to protect them (an internal shell and an external "cosmetic" shell). Smart Parts claims that this marker has many possible upgrades, although most of these are limited to the guns mounting rails thus far. As with the Vibe, players whom own this marker are finding ways to shut off the Maximum Rate Of Fire limiter. With Smart Parts releasing the Blackheart in Q1 2008, the rate of fire is raised to 20 BPS. Along with that it adds anti-chop eyes.