The Xtag Sniper Taculizer Picatinny Rail and Stabilizer System is the most versatile stabilizer in the world boasting four integral polymer Picatinny rails for attachment of lasers, lights, cameras, and much more. The stabilizer itself is constructed of 6061 aluminum. It's built out with 2 Matthews harmonic dampers and 1 harmonic stabilizer to help silence your bow, plus removable front and rear caps. Choose between 7.5 oz. (4'') or 10.5 oz. (6'') models.6061 aluminum 4 polymer Picatinny rails 2 harmonic dampers by Mathews (front and rear)1 harmonic stabilizer by Mathews. Removable front and rear caps