14.5in. 22 caliber lothar Walter barrel that fits all crossman Pistols and rifles with standard diameter crossman barrels.Drop in fit. $70.00 shipped . TKO Moderator 6.5in. Slip on and held with 2 grub screws. 8.75in diameter. These really a great job quieting down the crossman and Benjamin air rifles. $50.00 each shipped.