CALIBER 7.62mm (30 Caliber) - WEIGHT 16 oz - DIAMETER 1.75 in - OVERALL LENGTH 8.5 in - ATTACHMENT / MOUNT Quickie Fast-Attach - MATERIAL(S) Stainless Steel - FINISH Melonite - QUICKIE MOUNT FAST-ATTACH. CLASSIC. - UPDATED BAFFLE DESIGN. QUIETEST .30 CAL CAN IN THE WORLD. - ALL STEEL SO NO FLASH AND ADDED DURADILITY - PREMIUM VALUE. UNBEATABLE QUALITY. = QUIETEST SUBSONIC 300 BLK CAN YOU'VE EVER HEARD HANDS DOWN. - WEIGHS THE SAME AS A MEDIUM-SIZED GRAPEFRUIT.