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NEW!! ALG Defense QMS & ACT Triggers – Tuned by Geissele

Posted on February 2nd, 2012 by ar15news

Check out this very affordable new trigger line from ALG Defense.  These triggers are all tuned by Geissele Automatics  so you know they’re good to go.  If you’ve ever wanted to upgrade your duty weapon but couldn’t because of departmental policies against custom or aftermarket parts, now’s your chance as these are simply finely tuned Mil-Spec triggers.  This would also be a nice upgrade for any non LE/MIL AR owner who is looking to swap out the stock trigger on a budget of less than $100.   

My good friend John over at Rainier Arms has been awarded the launch of this new ALG Defense trigger line and has been authorized to take up to 100 pre-orders.  Triggers should be shipping at the end of February.  Click HERE to Orders yours now and be the first to have this amazing trigger.  Rainier Arms will be the first Distributor to have them.  Check out the pics and information below!

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.

**Tuned by Geissele Automatics**

Performance Advantages for the Shooter:

  • The ALG Defense QMS trigger pull is smoother and sharper 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 the standard profile 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. Both pins are Nickel-Teflon coated.
  • Pull weight is above the U.S. Military minimum pull weight of 5.5lbs but does not reach near the upper limit of 9.5lbs. Generally, the pull weight is about 6.5lbs.


Advantages for the Armorer:

  • The ALG Defense QMS trigger is an enhanced standard trigger so maintenance and installation procedures are unchanged.
  • There is spare parts commonality between the QMS and stock triggers
  • Trigger assembly parts may be interchanged between triggers, there are no matched sets.
  • Since it is a trigger meeting the U.S. Military trigger specifications for the M4 Carbine, the ALG Defense QMS can be substituted for lower performing stock triggers while still staying in compliance with Unit or Departmental requirements.

The ALG Defense ALG Combat Trigger (ACT) is designed for those shooters where tradition, value and regulatory concerns are of primary importance. The pull of the ACT is very similar to a standard mil-spec trigger, however it is sharper and the grittiness of the stock trigger pull has been removed while the traditional reliability of a stock trigger remains. The pull weight is not lower than the M4/M16 minimum weight specification of 5.5lbs.

**Tuned by Geissele Automatics**

Performance Advantages for the Shooter:

  • The ALG Defense ACT trigger pull is smoother and sharper than a stock trigger. This is accomplished by polishing the sear surfaces smooth and HardLubing the trigger components.
  • Sear geometry has not been changed from the standard profile 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. Both pins are Nickel-Teflon coated.
  • Pull weight is above the U.S. Military minimum pull weight of 5.5lbs but does not reach near the upper limit of 9.5lbs. Generally, the pull weight is about 6.0lbs.

Advantages for the Armorer:

  • The ALG Defense ACT trigger is an enhanced standard trigger so maintenance and installation procedures are unchanged.
  • Trigger assembly parts may be interchanged between triggers, there are no matched sets.
  • As a trigger meeting the essential U.S. Military trigger specifications for the M4 Carbine, the ALG Defense ACT can be substituted for lower performing stock triggers while still staying in compliance with Unit or Departmental requirements.


Note about HardLubing:
HardLubing is ALG’s term for electroless Nickel plating with an integral modifier to the base nickel plate. Either Boron or Teflon is used to enhance surface hardness, wear resistance and corrosion resistance and also create favorable tribological properties of the trigger components. Testing has shown that differential coating of the trigger parts contributes to the sharpness of the ACT’s single stage pull. The trigger component is plated with Nickel-Boron which has a high surface hardness combined with excellent wear resistance. The color is a pleasing matte light grey that may be painted on non-functional surfaces if the shooter so desires (such as the trigger bow that is visible outside the lower receiver). The hammer, disconnector and trigger/hammer pins are plated with Nickel-Teflon which combines a low coefficient of friction with good wear resistance. The Teflon impregnation colors the metal a mottled, greyish/green. Parts coated with Nickel-Teflon cannot be painted. Both coatings are highly corrosion resistant eliminating the oil seal of traditional phosphated firearm components.

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