Luth-AR Forward Assist Assembly Black. It fits any standard AR15-pattern handguards and can also be installed on many patterned lower receivers. The Forward Assist is machined from forn steel with a phosphate coating in a whorled state for a smooth front activation. The force required to trigger the forward assist is only slightly less than the force required to take a normal trigger pull so it won't catch on the clothing. After the trigger is pushed it won't bounce back up and down or off the face of the stock. This makes it a great choice for those who want to hand-install the forward assist themselves. This kit was designed for that very purpose. Specifications for Luth-AR Forward Assist Assembly: Manufacturer: Luth-AR Color: Black Finish: Anodized Fabric/Material: Stainless Steel Steel Gun Make: AR Platform Gun Model: AR-15 Weight: 0.8 oz Features of Luth-AR Forward Assist Assembly: Shipping Weight .2 lbs Shipping Dimensions 1 x 1 x 1 in Weight Ounce .8 Weight lbs .05 UPC Code 859819007874 Package Contents: Luth-AR Forward Assist Assembly Forward assist Forward assist spring Forward assist pin What firearm models does the manufacturer say Luth-AR Forward Assist Assembly is compatible with? The manufacturer says that Luth-AR Forward Assist Assembly is compatible with AR-15Luth-AR UR-08-R: Forward Assist Assembly Black