M.O.A. Trigger System.


What is the M.O.A. Trigger System?

Model 70 and XPR rifles. The M.O.A. Trigger system is a proprietary system developed by Winchester Repeating Arms for both the Model 70 and the XPR bolt action rifles. Through ingenious engineering you get a trigger that is lighter, crisper and more consistent than ever thought possible for a production rifle. The description below applies to both models, but specifically speaks to the Winchester XPR with the M.O.A. system.

M.O.A. Trigger SYSTEM. The XPR™ rifle's M.O.A. Trigger System works on the simple principle of the pivoting lever. The system offers a 2:1 mechanical advantage that results in a superior trigger pull. The M.O.A.’s trigger piece offers a wide, smooth face to better distribute finger pressure for a lighter, more sensitive feel. Because of its geometry and 2:1 mechanical advantage, the trigger piece travels only half the distance of the actuator (2X). Since this distance is cut in half, the perception of creep and overtravel are virtually eliminated. This means that your “feel” for the trigger is greatly enhanced, and thus your effective accuracy, both in the field and off the bench are improved.

  1. ZERO TAKE-UP. Take-up is the distance the trigger piece travels prior to the sear moving toward release and the shooter feeling resistance. The XPR™ rifle’s M.O.A. Trigger System uses a spring to eliminate take-up by keeping the trigger piece in constant contact with the actuator. Unlike many competitors’ designs, the unique geometry of the M.O.A. pre-loads the entire trigger system to bias-out normal manufacturing tolerances.
  2. ZERO CREEP. Creep is the perceptible movement of the trigger prior to the release of the firing pin and has a negative influence on accuracy, causing inconsistency and uncertainty during the pull of the trigger. Creep contributes to jerking the trigger, thus adding to movement of the gun during firing. The 2:1 mechanical advantage created by this unique design geometry has virtually eliminated creep in the XPR™ rifle’s M.O.A. Trigger.
  3. ZERO OVERTRAVEL. Overtravel is the rearward movement of the trigger after the firing pin has been released. It can actually jar the gun away from its intended point of aim and is very distracting to the shooter. The XPR™ rifle’s adjustable M.O.A. Trigger System is set at the factory to break at a crisp 3 1/2 pounds with no perceptible overtravel. When the sear drops, the trigger stops. Where you aim is where you shoot.

(1) M.O.A. TRIGGER SYSTEM The XPR™ rifle’s M.O.A. Trigger System works on the simple principle of the pivoting lever. Pictured above are the trigger piece (A), actuator (B), and sear (C).

(2) 2:1 MECHANICAL ADVANTAGE The M.O.A.’s trigger piece offers a wide, smooth face to better distribute finger pressure for a lighter, more sensitive feel. Because of its geometry and 2:1 mechanical advantage, the trigger piece travels only half the distance of the actuator (2X). Since this distance is cut in half, the perception of creep and overtravel are virtually eliminated. This means that your “feel” for the trigger is greatly enhanced, and thus your effective accuracy, both in the field and off the bench are improved.