Simply lock back the bolt on your weapon and insert the keyed BRO-LOCK into the ejection port of your firearm to render the weapon unusable AND visibly safe. Once the lock is engaged, the rifle cannot be charged or fired and prevents weapon disassembly. The high visibility red anodized finish lets you know that there is a lock in the weapon. Features: Made in the USA High quality laser engraved branding Aircraft grade anodized aluminum