The BCA AR-15 lower receiver is fully machined and forged to milspec from 7075 aluminum. Perfect fit and function for that next AR build. BCA lowers will power your AR as long as you can. Stamped Multi Caliber. Features Fully Machined Forged to Milspec from 7075 Aluminum Stamped Multi-Caliber *Must be 21 Years of Age or Older to Purchase {{widget type="Magento\Cms\Block\Widget\Block" template="widget/static_block/default.phtml" block_id="42"}}