Fully machined billet aluminum housing that keeps the hardened tool steel internal components in precise alignment. Ensures a smooth, clean, match-grade, 3 lb. trigger pull for superb shot-to-shot consistency, smaller groups, and higher scores. Unique magazine release extends under the triggerguard to position the contact surface in easy reach and provide extra leverage for fast, easy magazine changes. Trigger Housing includes the extended magazine release lever and fixed ejector. Accepts original factory internal components or aftermarket parts that are direct replacements for factory parts.