ALG Defense Quality Mil-Spec Single Stage Curved Trigger (QMS)

Upgrade Your AR Platform with the QMS Trigger

Looking to eliminate the grit of a standard factory trigger without sacrificing military-grade reliability? The Quality Mil-Spec Trigger (QMS)—manufactured by ALG Defense and engineered with legendary Geissele expertise—is the ultimate drop-in upgrade for shooters who demand dependable performance, traditional feel, and strict regulatory compliance.

Why Choose the QMS Trigger?

• Smoother Pull: Expertly honed sear surfaces remove the gritty, dragging feeling of a stock mil-spec trigger while keeping standard geometry intact.
• Compliant & Reliable: Maintains a clean pull weight above the U.S. Military M4/M16 minimum specification of 5.5 lbs (averaging roughly 6.5 lbs), making it ideal for department regulations and duty use.
• Positive Ignition: Features a full-force military-specification hammer spring to guarantee reliable ignition across all types of ammunition.
• Precision Pins Included: Upgraded 4140 chrome-moly steel trigger and hammer pins are centerless ground, nickel-teflon coated, and sized 0.001” larger than stock to minimize receiver play.

Technical Specifications

• Platform: AR-15 / AR-10 / M4 variants
• Trigger Type: Single-Stage / Enhanced Mil-Spec
• Trigger Pull Weight: ~6.5 lbs (Meets/exceeds 5.5 lb mil-spec minimum)
• Trigger Bow: Curved (Mil-Spec standard)
• Trigger & Hammer Material: True 8620 Alloy Steel (Mil-Spec Castings, Carburized, Quenched & Tempered)
• Disconnector Material: 1070 High Carbon Steel (Austempered)
• Pins: 4140 Chrome-Moly Steel (Nickel-Teflon Coated)

Whether you are building a duty rifle, a home defense weapon, or a standard range carbine that complies with agency rules, the Geissele QMS delivers a crisp, clean break with zero compromise on safety or ruggedness. Experience the upgrade today.