AT3™ 2-Stage AR 15 Lower Parts Kit with 4.5lb Nickel Boron Trigger – No Grip or Trigger Guard

SKU: LPK-2-STAGE

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Backed by the AT3 Lifetime Warranty!
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Experience the difference a 2-Stage Trigger makes in your next build.

Get more out of your rifle with a two-stage trigger and always-dependable Pro-Builder Lower Parts Kit. With a 4.5 lb total pull weight and a durable Nickel Boron finish, this trigger ensures a smooth pull and crisp break every time you squeeze the trigger.

The two stages of this trigger consist of an initial 2 lb pull that brings you to a “wall”, where the hammer and trigger are set to break for the shot. After that, it’s only a 2.5 lb pull to fire, helping you to make accurate shots with short resets in between.

American Made Quality

  • All parts meet or exceed military specifications (Mil Spec)
  • Components are 100% Made in the USA
  • Quality packaging keeps components protected and organized

Easy to Install

  • Quick and easy installation – can typically be done in 10 minutes using our detailed instructions. No special tools required.

Parts Included:

  • 2-Stage Nickel Boron Trigger
  • 2-Stage Nickel Boron Hammer
  • 2-Stage Disconnector
  • Trigger spring
  • Trigger pin
  • Hammer pin
  • Hammer spring
  • Disconnector spring
  • Bolt catch
  • Bolt catch plunger
  • Bolt catch roll pin
  • Bolt catch spring
  • Buffer retainer
  • Buffer retainer spring
  • Magazine catch
  • Magazine catch button
  • Magazine catch spring
  • Pivot pin
  • Pivot pin detent
  • Pivot pin detent spring
  • Selector
  • Selector detent
  • Selector detent spring
  • Takedown pin
  • Takedown pin detent
  • Takedown pin detent spring
  • Pistol grip screw and lock washer
  • Detailed parts diagram included for quick and easy part identification

About The 2-Stage Trigger

AT3 has these 4.5 lb 2-Stage triggers made by Schmid Tool Schmid Tool is best known as the premier manufacturer of mil-spec AR-15 fire control groups. From government contracts to the biggest rifle manufacturers – Schmid Tool triggers have been trusted in millions of weapons over their 60 years in business.

Our goal in this partnership is to bring our customers world-class engineering and manufacturing, with factory-direct pricing. For the finest quality triggers you can stake your life on, without the “big brand” price tag.

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

AT3 Lifetime Warranty Logo

All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.

This includes AT3 Red Dot SightsHandguardsIron Sights, and any other product that carries the “AT3 Tactical” or “AT3™” name. For other brands (ex. Magpul or Troy), please refer to the manufacturer’s warranty policy.

In the event that your AT3™ product becomes unusable, we will repair or replace the product at no charge to you.

If we cannot repair your product, we will replace it with a product in perfect working order of equal or better physical condition. The warranty is fully transferable, but we may require information about the original purchase to validate the authenticity of the product.

If your product is in need of warranty service, please contact AT3 Tactical to start the process

Our contact info is available here. To expedite processing, please provide your order information and description of the defect.

Please note: The AT3 Lifetime Warranty does not cover loss, theft, intentional damage or cosmetic damage that doesn’t affect the performance of the product.

Customer Reviews

Based on 31 reviews
81%
(25)
13%
(4)
3%
(1)
3%
(1)
0%
(0)
B
Bobby Hewitt
Zombie rifle

I've ordered from AT3 tactical a lot and they always have great service and parts. I have tried other suppliers but seem to never get the service I get from AT3. Parts are good and prices are good as well. Not all the parts I ordered last time went on this rifle. But 95% did other parts are waiting on next build

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

N
Nicholas Laxton
Decent kit, Not sure about the trigger

Decent kit. The trigger seems to have a 1st stage under 2 pounds and the 2nd stage feels closer to 3.5-4 lbs, haven’t verified it though... It still is smooth and has a crisp break, The reset is quick. In
The pictures it shows 1005 tactical etched into the trigger and hammer. The trigger Group I got has no markings or stamps proving its a 1005 tactical. Over all it will do the job.

Thanks for sharing your feedback, Nicholas. We're glad you're satisfied with your purchase. Cheers!

R
Ryan
Great parts kit at an excellent price

I purchased this for my first AR build and could not be happier with the quality, especially for the price. I had every intention of putting this together and in the future upgrading the trigger to a Timney or Geiselle. After running several rounds through it I could not justify the added expense. This trigger is smooth, has a perfect candy cane pull, an audible reset that is a good combination of short and smooth, and went together easily. I would highly suggest this kit and will be purchasing again for my future builds.

Thanks for sharing your feedback, Ryan. We're glad you're satisfied with your purchase. Cheers!

D
Daniel Myers

very smooth trigger pull great price quality parts couldn't have asked for a better value

Thanks for sharing your experience, Daniel. We're glad you're satisfied with your purchase. Cheers!

B
Badgers
Better than expected!

I picked this up for a good price with a LPK on a Daily Deal... Always been wanting to try a 2-stage trigger, I figured this was the time...

Installs like any milspec trigger, but that is where the similarities end... I was super impressed with the fit and finish of this FCG... plus coming in around $100 with the LPK, you cant go wrong. I like it better than my 3lb single stage

I put this into a Noreen billet lower and matched it up with the AT3 Tactical SPEAR Upper combo in Magpul Stealth Gray, topped it with a midrange 1-6x24 scope..... Its way to nice to be shooting 7.62x39... It looks good, feels good and shoots even better...

Thanks again AT3!

Looking good! Thanks for sharing your experience, Badgers. We're glad you're satisfied once again with your purchase. We'll continue working hard. Cheers! - AB

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