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.


KIT B (AR-15) is compatible with many manufacturers and calibers of AR-15 magazines with a NON removable floorplate. Some of the most popular are listed below.

  • ANY brand of stamped aluminum magazine
  • Lancer L5 AWM 10 round, 10/20, and 10/30 magazines
  • Magpul PMAG M3 10/20 and 10/30 magazines
  • Hexmag 10/30 magazines


  • 4-UBBT tips
  • 4- 4-40 x 1/2" Stainless steel set screws
  • 1-Hex Wrench
  • 1-Thread forming screw (for aluminum magazines only)
  • Installation instructions

Made in USA

It is the responsibility of firearms dealers and private firearms owners to know and fully understand all federal, state, and local firearms laws in their area. Thordsen Customs LLC will not be held liable for any misuse of its products and will assume that our product(s) comply with federal, state and local laws unless otherwise notified by authorities.


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