The creativity named HG Handguards offer a universal solution for those looking for a replacement handguard for their WK180s, WK181, Raven builder kits or AR15s. They are compatible with both piston systems and gas tubes. The handguards are Mlock compatible to allow for customization while keeping the weight down. The HG handguards work well with the Specter Arms S8 linear compensator and the assortment of after market barrels that we offer. (Please see the S8/S9 ad pictures for some examples). The handguards are free floated for accuracy and clamp on to the receiver using a sturdy steel barrel nut. Be careful of cheap imitations that use an aluminum nut. Lengths of 7",9",11" and 12" available. Only available in black. Shipping available at actual cost or pick up in SE Edmonton.