Description Reviews Q&A Description Barrett makes this black 10 round magazine with witness holes for their .50 BMG M107A1. Rugged and dependable Barrett Quality. Reviews No Ratings Be the first to review this item Write a Review Q&A Have a question about this? Name This will be displayed next to your question. Email This is where you will receive the answer to your question. Your email address will be kept private and only used to answer your question. Type Question Here Submit New Question