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Product Discontinued by Manufacturer

ALG Defense QMS Select Fire Trigger Top Level Assembly has been discontinued by ALG Defense and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Gun Parts, AR 15 Parts, Rifle Parts, Rifle Triggers, AR15 Lower Parts, AR Triggers yourself to try and find the perfect replacement for you!

Product Info for ALG Defense QMS Select Fire Trigger Top Level Assembly

The ALG Defense Quality Mil-Spec (QMS) Trigger is designed for those shooters where tradition, value and regulatory concerns are of primary importance. The pull of the QMS is very similar to a standard mil-spec trigger, however the majority of the associated grittiness of the stock trigger pull has been removed while the well known reliability of a stock trigger remains. The pull weight is not lower than the M4/M16 minimum weight specification of 5.5lbs.image

Features of ALG Defense QMS Select Fire Trigger Top Level Assembly:

  • The ALG Defense QMS trigger pull is smoother than a stock trigger.
  • This is accomplished by honing the sear surfaces smooth while not removing metal below the valleys of the stock surface finish.
  • Sear geometry has not been changed from standard so the high reliability that the stock trigger is known for is unchanged.
  • Trigger and hammer are made from true 8620 alloy steel military specification castings, correctly carburized, quenched and tempered for high surface hardness.
  • Disconnector is 1070 High Carbon steel properly Austempered into the spring range of hardness
  • Springs are corrosion resistant and meet military specifications.
  • A full force hammer spring is used for positive ignition of all type of ammunition.
  • Trigger and hammer pins are improved over stock mild steel by using 4140 Chrome-Moly steel that has been quenched and tempered.
  • Pins are centerless ground to a fine finish and a diameter 0.001" larger than stock to reduce play in the trigger assembly while retaining a slip fit into the weapon lower receiver.

Package Contents:

  • ALG Defense QMS Select Fire Trigger Top Level Assembly

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Related Products to ALG Defense QMS Select Fire Trigger Top Level Assembly

ALG Defense QMS Select Fire Trigger Top Level Assembly Unavailable & Discontinued Models

List of Unorderable Models

  • ALG Defense QMS - Select Fire Trigger Top Level Assembly, 05-640 , MPN: 05-640 , UPC: 810081131070 , Code: 1SY-ART-NNBH-05-640
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Last updated 2026-11-06 UTC.