From Guns.com:

TacPack customers pay a flat monthly fee of $49.95 and in exchange get a box full of goodies delivered right to their mailbox. The boxes contain all manner of gear related to guns, every day carry and survival with each box’s contents retailing for between $80 and $100. Content changes from month to month, ensuring that consumers get a wide array of products such as slings, spare mags, patches and knives from big names in the biz like Magpul, 5.11 Tactical, Mission First Tactical, Gerber and even Black Rifle Coffee Company to name a few.