Lower Parts

Super Dynamic 3 Gun (SD-3G) Trigger

Super Dynamic 3 Gun (SD-3G) Trigger

Super Dynamic 3 Gun (SD-3G) Trigger

Type: Single Stage
Total Pull Weight: 3.0 - 4.0 lbs. (Lighter Spring)
4.5 - 5.5 lbs. (Heavier Spring)
Adjustable: No
Recommended Use: 3 Gun
Pin Size: Mil-Spec

All weights are approximates.

Please note, our triggers are designed for mil-spec AR15/M4 carbine rifles. Our AR15 triggers are not compatible with the Sig MPX/MCX weapons.

The Geissele Super Dynamic 3 Gun (SD3G) trigger is the flat trigger bow version of the Geissele Super 3 Gun (S3G) trigger.


Item Number:



In stock

Super Dynamic 3 Gun (SD-3G) Trigger

Full Description

The Geissele Super Dynamic 3 Gun (SD-3G) Trigger is based on the S3G Trigger. Like the S3G, the SD-3G has a shortened pull length and a lightning-quick reset to give it a unique, hybrid trigger pull that is a cross between a traditional two-stage and single-stage trigger while still retaining the safety and robustness of a two-stage combat trigger. The SD-3G’s flat trigger bow further enhances the trigger’s performance by reducing the perceived pull weight and improving the trigger’s tactile feedback to the operator making it ideally suited for 3 Gun competition shooting.

Additional Information

Notes The SD3G trigger has a very short, light pull and reset. We do not recommend it for duty use, bench rest, accuracy work or shooting small groups. It is designed for close course competition use where rapid target engagement with quick follow up shots are required. * COLT 901 RIFLE USERS PLEASE SEE ARMORS TOOLS FOR PINS (PART# 02-269) THAT WORK WITH THE WIDER RECEIVER
Size Standard Mil-Spec Pin
Intended Function Target Shooting, Competition
Trigger Bow Type Flat
Weapon Platform AR15/AR10


Installation Instructions

Super Dynamic 3 Gun (SD-3G) Trigger

Reviews (21)

overall rating 5.0

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I want another - Anthony

I'm very impressed and happy with my purchase , the trigger comes very well packed with an additional "swag pack" that was the icing on the cake .
Upon first glance the trigger really looks out of this world , beautiful high quality finish unlike the majority of triggers , and the sleek sharp lines of the SD3G trigger are sexy like a race car .
After a quick easy install in my spikes lower I hit the range and it blew my mind , turbo engaged !!!
The range safety officer came over after I dumped my first magazine in seconds and asked if my shockwave blade was a bump stock :)
I was able to keep shots on target in rapid succession , I used the 3.5 pound black spring and had no problems controlling shots .
very satisfied customer , Thank you very much

February 26th, 2019

Best decision I've made parts wise to date - chris

Worth every last penny absolutely love this fire control group have already had one or two interesting conversations with off duty officers who would have insisted on checking out my weapon to ensure that it is not fully automatic cheer in Washington State, After reviewing it they still asked me if I would at least stop using it until they went away because they were stunned by how quick it would operate. If you want a fire control group that fires extremely fast and it still has amazing control you have found it definitely looking into buying more geissele triggers in the future.

February 25th, 2019

Love at first press. - JP

Running the lighter spring and it was Love at the first press of the trigger. Super fast follow up shots and it’s just an amazing trigger. This is my third Geissele trigger. Started out with the G2 then the SSA and now SD3G. Have just over 3k rounds with it and not a single issue. My only issue is now I want the super single stage and the tricon and I promised my fiancé I was done building two guns ago!! Thanks Geissele for probably ending my engagement. Seriously, I have zero self control with your products and just ordered my 4th rail today, and will decide which of the previous mentioned triggers is next! My one comfort is I know your products will be with me for my lifetime.

August 29th, 2018

It’s a Geissele, what else needs to be said? - YearZer0

The SD3G Trigger found a Home inside my Daniel Defense MK18, and it won’t be going anywhere anytime soon. This Trigger is super controllable, and it’s easy to squeeze off Controlled Pairs without putting any Thought into it. My custom R700 will be getting the Geissele Treatment soon, and I expect it to be nothing short of impressive also.

July 3rd, 2018

Stock trigger on a DDM4V11 Pro - Mick

The Daniel Defense is my first and probably only AR. It's a plinking toy sure if I like a single stage Trigger or not.

I can only compare it to Remington Striker filed rifles.

I would really like to buy a two-stage trigger to compare but this is it pretty nice trigger.

The flat bow is a great innovation.

December 16th, 2017

Awesome Service/Awesome Product - Chad

I ordered this trigger on 2017 Black Friday and got a great deal. I did not get a notification that it had been shipped out and I waited a few day, so I emailed the company and they responded very promptly and stated that all Black Friday deal have 4-6 week lead time in which case I missed. They took the time to respond to a stupid question and the trigger got here in 2ish weeks. Just Awesome

December 12th, 2017

Perfection achieved. - Craig

Anyone who knows me knows I love to rip rounds down range as fast as I can. I have a quick trigger finger. With this trigger and my Battlecomp it's like cheating. With the 4lb spring my gun runs like a sewing machine. The spent brass was in a neat little pile.
If you're on the fence about getting one or not.. jump on this trigger.

November 9th, 2017

Highly Recommended! - JONATHAN

I have two SD-3G triggers on both of my AR-15s. I am running the lighter spring on the AR-15 that sees a lot of fast shooting and the other AR-15 has the heavier spring since that setup as a SPR rifle. I really like the single stage feel and quick reset on these triggers. I had other nickel-born coated triggers but the SD-3G beats them.

July 24th, 2017


I purchased this SD3G for my build I am putting together. Have not shot it yet as I am not done completing my build, but can say that it is probably the same trigger or better than the S3G I have on my other rifle. Been waiting for Geissele to come out with a flat trigger and my prayers were answered. Thank you guys.

June 26th, 2017

Best trigger money can buy - Kevin

After countless hours researching after market triggers I decided to purchase the SD-3G even though it cost more than other quality triggers on the market. My decision was based on a few things: 1. Its a drop in trigger requiring no extra tools like some of the other brands of triggers. 2. There are no bad reviews on it. 3. All reviews say it is extremely high quality and the smoothest trigger out there. I have to say no trigger compares to this one! The attention to detail on this thing is amazing. It has zero creep, breaks extremely crisp, and has so short of reset it only requires a twitch of the finger to reset. If you're hesitating to pay the extra money for Geissele over brand X, don't! This trigger is worth every penny. If Geissele made a trigger for my 22lr, pistol, and bolt action I would put one in all my guns.

Thank you Geissele for the amazing trigger.

May 31st, 2017

Best triggers I have bought!!! - Marco

I read a lot of reviews on this trigger and decided to buy one. I was so impressed with how it performed I'm going to buy another one. I was bragging to my boss on how awesome this trigger was and he bought one too. As soon as the SSP is available that will be my next purchase.
Thanks for making great products

May 21st, 2017

SD-3G Trigger - Keith

I went through a lot of trigger reviews and done a lot of research on triggers. Well, I went through and checked out all the Gisselle triggers and choose the SD-3G and I'm sure glad I did. The best trigger I've ever shot. Super fast and makes you very accurate on follow up shots. Will be a customer for life now. Made my Daniel Defense m4v11 the perfect gun. I see why DD used it in the pro edition of their guns
. Thanks Bill Geissele I give it 5 stars.. it wont let me hit the 5th star on my iPad Pro.

March 7th, 2017


If your on the fence about spending the money, buy it. I for one was never a believer in spending a couple hundred dollars on a trigger but it was worth every penny. I get so much more control from my hunting rifle, especially from free standing shots. On a bench it's unbelievable. So happy with the sd-3g I'm going to be adding the sd-e to my long range precision rifle as soon as possible.

March 1st, 2017

SD-3G - Michael

I was running a different flat single stage that I just could not get consistent pulls with. Switched over to the SD-3G and it is like night and day. Amazingly crisp and clean pull and reset. I am running the 3.25# spring supplied, tested right at 3.25# on the scale. Easy install and quality piece.

January 30th, 2017

Amazing Trigger - Christian

I splurged on this Trigger because I heard it's the fastest on the market and boy was I not let down, I was absolutely amazed how fast you can fire a rifle with this trigger I mean it made a night and day difference in my DDM4V11 SLW with the SD-3G Trigger I was just blown away totally amazed, I know it's a little on the expensive side but it's worth every penny I 100% recommend this Trigger to anyone who really wants an upgrade to their AR that will make a night and day difference in the performance of your rifle, go with this Trigger you will not be let down!!!

December 23rd, 2016

Hands down the best trigger I've ever used - Sean

I finally broke down and bought this trigger for a custom AR build, and boy was it ever the best decision I made with this gun. It's smooth, crisp, and light, and with how fast it resets you can seriously fire at a blinding rate. It's effortless to put ten rounds into 6" steel at 25 yards with this thing. If you're on the fence about spending the money, just do it. You WON'T be disappointed!

December 6th, 2016

SD-3G - Mark

Love the trigger. Had an issue at first with it not resetting but found out i had the wrong buffer / buffer spring weight for a .300BLK. I called the company and they helped me troubleshoot it over the phone and got me squared away. They let me know that if it was an issue with the trigger that they would stand behind the product and replace it. Amazing trigger, even better customer service. Thanks!

December 6th, 2016

SD-3G - Dennis

Ran the S3G for the first time today. This is my second Geissele but my first single stage. Big grin after running it today & I know it'll only get better. It's all that I thought it would be. Super clean reset & produced nice groups at 25yrds. Get Some!

July 25th, 2016

Watch Bill Geissele's YouTube, “Choosing the Right Trigger for You”. - Marc K

Extraordinary! Surgically precise engineering! Pulled slowly, the SD-3G has a finely honed, level, approximately 2mm pull and then it breaks cleanly like a thin potato chip. The pull weight is 3.25 lbs on the SD-3G with the lighter spring, but the straight trigger bow shape makes it feel like 2.25 lbs versus a curved bow trigger. The SD-3G is perfect for me with its fast rate of fire inside 50 yards paired with my Sig Sauer MPX. (Note: Geissele recommends their SSA-E in the 9mm MPX for reliability.) Precise shots and the closest you can get to three round burst in a semi. I’m highly impressed and hooked. Thanks Bill!

May 26th, 2016

Best I have shot - Patrick

After going through and owning/trying all major competitors I found a winner. This is an incredably fast and accurate set up. After being in sibelief about the feel, precision, and speed I let my brother (novice shooter) shoot some mags. I have never seen someone get so good so fast. This trigger evens the playing field.

April 8th, 2016

sd3g trig - dennis

you want a fast trigger? look no further. this trig is lightning! the sd3g is an excellent trig took me along time to pick a trigger and i'm glad a got this one!

February 1st, 2016
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