Thordsen Customs UBBT Kit A Installation Instructions
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A magazine mounted tool has proven to be the most efficient method of performing fast magazine changes on California Compliant "magazine lock" equipped black rifles and pistols. Our Ultimate Bullet Button Tool (UBBT) kits and magazine enhancements are one of the most popular solutions available.
Our injection molded nylon tips are super durable, reinforced by stainless steel mounting hardware, and easy to install. The unique (patent pending) shape of the UBBT tip makes it compatible with ALL major brands of AR-15 magazine locking devices.