Check the listing for details. AGP Arms Buttpad for Sig 556 and Sig 522 Extra Thick. Color: Black, Condition: New. Listed at 55.00 USD. This AGP Arms Buttpad is designed for use with Sig 556 and Sig 522 rifles, providing a comfortable and secure fit for the user. Made from durable rubber material, this low profile pad is built to last and withstand even the toughest of conditions. Its sleek black color and compact design make it a perfect addition to any rifle stock. This Buttpad is made in the United States and is specifically designed for use with Sig SAUER rifles. Its gauge/caliber of 5.56 x 45 mm NATO ensures a perfect fit, while its brand name and high-quality features make it a reliable choice for any rifle user. Whether you're a hunter or a sport shooter, this AGP Arms Buttpad is a great choice for enhancing your rifle's performance and accuracy. This buttpad is the thick version about 1.375"