Certified Factory Installer

Thordsen Customs

UBMR

The Ultimate Bilateral Magazine Release (UBMR) is a revolutionary new device and the latest innovation from Thordsen Customs LLC. California AR-15 enthusiasts can now have complete ambidextrous control of their firearms and for the first time, right handed shooters can perform efficient tactical magazine changes with their Bullet Button AR-15.




Installation of the UBMR requires modification to the stripped lower receiver by a factory certified dealer. Calarmory is a factory certified dealer.

If you are not in the Camino area, ship me your lower or receiver and I will do the installation and ship it back the same day. Overnight shipping is available.

Contact us for more information regarding this innovation.

Latest News

 CalArmory is now installing the UBMR
Check it out here!
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