SLR M-LOK Mod1 Handstop Black. The M-LOK system allows for multiple accessories to be added to a Picatinny Rail and this extra Hand Stop adds extra stability while shooting so that you'll be able to better aim while reducing the likelihood of an unintentional misfire. The SLR M-LOK Mod 1 Hand Stop acts as a brace or forward stop for weapons that lack hand pockets in the trigger area. If you want to attach lights or any other accessories to your firearm this SLR M-LOK Mod 1 Adjustable Handstop is a great way to do so with minimal hassle. Specifications for SLR M-LOK Mod1 Handstop: Manufacturer: SLR Color: Black Fabric/Material: Hardcoat Anodized Aluminum Additional Features: Mod 1 Included Accessories: Hardware Mount Type: M-LOK Finish: Matte Package Contents: SLR M-LOK Mod1 Handstop SLR HS-ML1: M-LOK Mod1 Handstop Black