Our new round AR Handguards are the slimmest custom AR10 handguard on the market! 1.94 outside diameter with a 1.71 ID diameter. With our lightweight barrel nut, Most designs come in at under 14oz with all the hardware. Each handguard is has threaded holes on the top to attach picatinny rails and we can add extra if desired. With this design we are also offering custom lengths from 4in-15in in length. Anodized handguards take 4-5 weeks and Raw Handguards are only a few days. Contact us with any questions and we will be sure to help you out! Any of the AR15 slim handguards with be available in the the round series at no extra cost.