Click to expand Tap to zoom A&K M249 Hop-Up Champer Unit by A&K Save Liquid error (snippets/product-badge line 32): Computation results in '-Infinity'% $31.99 SKU A&K-HOPUP-G005 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Features Cast metal alloy construction Factory OEM spec. Bucking, barrel spring and other necessary components included Compatibility: A&K, Classic Army, Echo1 and other compatible M249 series AEGs