I’ll tell you right away that the most interesting feature of this AR-15 trigger is the removable or interchangeable trigger shoe. That feature is a part of what Airborne Arms calls M.S.A.T. (Modular Shooter Adaptive Trigger) technology. The trigger shoe attaches to the base via a T-slot and is held in place by a set screw.

The trigger is called Geronimo in honor of the 509th Airborne infantry regiment. The Geronimo trigger comes with a red color straight trigger shoe. However, the company is designing and will shortly release other shapes and colors, too. The shoe also has machined out surfaces from either side to aid the consistency of trigger finger placement.

The trigger parts are made of hardened A2 tool steel with the exception of the trigger shoe which is made of 7075 T6 aluminum (anodized). It is a single stage trigger with hand polished interacting surfaces. Hammer shape is also different from stock AR-15 one. Geronimo trigger comes with two different weight hammer springs. The trigger pull weight is 3 – 3.5 lbs with the light (yellow) hammer spring and 4 – 4.5 lbs with the heavy (red) spring. That variation of pull weights also depends on where exactly on the shoe you place your trigger finger.

Some of Geronimo trigger parts are made by JP Enterprises. Particularly, the anti-walk pins, as well as two hammer springs and the trigger spring.

This trigger is available through the Airborne Arms website at MSRP of $189.95 and as the company says, it is “designed, cast, machined and ground in the USA”.