IMI Defense FSG1 Front Support Grip O.D. Green IMI-ZFSG1O.D. GREEN. It is the only kind of a grip on the market that is designed to continuously merge with the AR15/M4 magazine well. Specifications for IMI Defense FSG1 Front Support Grip: Manufacturer: IMI Defense Finish: Matte Length: 12.5 in Fabric/Material: Polymer Features of IMI Defense FSG1 Front Support Grip Made of high-quality fiber-reinforced polymer compound Highly durable one-piece design Fits any 1913 rail no installation tools required Designed to continuously merge with the AR-15 / M4 magazine well Package Contents: IMI Defense FSG1 Front Support Grip IMI Defense IMI-ZFSG1O.D. GREEN: FSG1 Front Support Grip O.D. Green