Crosman Copperhead BBs offer superior accuracy for all airgun shooting activities. Copperhead BBs fit all .177 calibre air rifles and pistols. The BBs come packaged in a user-friendly, reusable plastic bottle with an easy-to-pour spout. Crosman Copperhead BBs. Copper-coated steel BBs Weight: 5.28 grains each Made in the U.S.A.