Samson Evolution Vertical Grip Long Grenade Black. Our Vertical Grips are available with M-LOK KeyMod or Evolution attachment plates. The two-piece design allows you to remove the grip from the rifle while leaving the attachment lug in place. Samson Vertical Grips are made of solid aluminum and stainless steel for their unmatched durability and dependability. Short: 2.125" Medium: 3.50" Long: 4.20" Specifications for Samson Eveolution Vertical Grip: Manufacturer: Samson Color: Black Condition: New Features of Samson Eveolution Vertical Grip Available for M-LOK KeyMod or Evolution systems Material: 6061-T6 aluminum Finish: Black MIL-A 8625 type III class 2 anodizing Package Contents: Samson Eveolution Vertical Grip Samson 04-03033-01: Evolution Vertical Grip Long Grenade Black