This is a Crimson Trace Corporation LaserGrip known as the Lasergrips, model LG-111.
LG-111 Lasergrips(R) for Ruger SP-101 revolvers are an ideal blend of rugged durability and ergonomic comfort. Featuring hard polymer construction" but with a smooth surface feel" the LG-111 provides for snag-free draws and the tactical advantage only Crimson Trace(R) Lasergrips(R) can offer.
Features:
Pressure activation
Red laser
Factory sighted at 50Ft
.5 inch diameter at 50 feet
