The horrible Norinco AR trigger.

rally guy said:
So whats the difference between the agl qms and act? There description seems identacal and were could one buy them?
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I was typing up the differences, but probably best to say, have a look at the Arms East website...

ALG

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.Note: 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.
1. 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.

2. 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.
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QMS

Description: 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.1. Performance Advantages for the Shooter
• 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.
• 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.


2. 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.
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Salient points, ACT vs QMS= assembly and pins nickel boron treatment, sear surfaces polished and hardlubed. Trigger pull ~5.5lbs
QMS = Smoother than AR15 stock triggers with honed and hardened sear surfaces. Properly manufactured and finished to ALG specifications. Generally about 6-6.5lb pull. A "Quality Mispec Trigger".
Both possess GA turned and hardened pins. ACT pins are nickel boron.

ALG triggers use AR15 geometry and components built to the high standards of ALG (and GA). The intent is the best "standard" AR15 trigger.
 
calvados.boulard said:
Excuse the AR noob question, but is it possible to lighten the pull weight on the ALG ACT?

Thanks,
Cal.
Click to expand...

Short answer is yes, but not much. Using lighter trigger group springs will lighten the pull a bit, but not without a cost. A real drop in trigger pull weight could be had by changing the geometry of the engagement surfaces, but it's not a DIY job for most of us. I'd contact ALG to see if the parts are surface hardened as well: In that case, changing the geometry is not an option.
 
Well, installed the ACT and I am DEEPLY impressed with the difference it has made. Crisp like crazy. Requires a conscious squeeze to set off, but nothing too Herculean, and is made of very good materials to a very high standard.

For $75, that is one hell of a deal. Thanks again for the tip. :)
 
I just took delivery of Palmeto State Armory AR-15. trigger was a bit better than average stock military trigger. I have a Rock River on order for it, but I could polish this one and live with it.

The Danial Defense was by far the worst trigger I ever found on a new rifle. It was so bad that I gave up trying to test ammo for it, until it got a Rock River.

The Norinco was about average in stock form. Before I put a Rock River in it I just polished it up and it was ok.

The NEA triggers are about average. Most now have Rock Rivers, but the little one has a polished stock trigger and it feels quite good.
 
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