A3 Industries M-LOK Modular Vertical Foregrip w/ Integrated Handstop - 2in Grooved Grip Black. Its modular design supports multiple grip configurations including short and mid-length options for close-quarters use. The Picatinny model requires only 2.25'' of rail space and the M-LOK version installs on a single slot. Constructed from 6061 aluminum with stainless and Grade 8 hardware the grip provides outstanding durability and retention under heavy use. All aluminum components feature a low-gloss black anodized finish. Specifications for A3 Industries M-LOK Modular Vertical Foregrip w/ Integrated Handstop - 2.75in HK Grooved Grip: Manufacturer: A3 Industries Color: Black Material: Aluminum Mount: M-LOK Package Contents: A3 Industries M-LOK Modular Vertical Foregrip w/ Integrated Handstop - 2.75in HK Grooved Grip A3 Industries VFG-167: M-LOK Modular Vertical Foregrip w/ Integrated Handstop - 2in Grooved Grip Black