Lifetime Warranty! Precision Machined Out of Premium 6061 Aircraft Grade Aluminum * Precise Fitment * Bead Blast Hard Anodized Finish * Over barrel nut flush fitment with most AR-15 Upper * Please note that installing a free float handguard is an involved process that involves additional tools to install; we recommend first watching an instructional video on youtube before installing, or better yet employing an experienced gunsmith