Why is there two buffer spring in the package? So whats the difference?

Per the manufacturer... "to provide flexibility in tuning the firearm's cycling speed and recoil for optimal performance with different AR platforms and calibers."

Hi Vlademeir and welcome. The Franklin Armory BFSIII AR-S1 Binary Trigger kit includes two buffer springs to provide flexibility in tuning the firearm's cycling speed and recoil for optimal performance with different AR platforms and calibers. Increased Cycling Speed: The kit includes a stronger buffer spring (the black-end spring) to help speed up the bolt cycling, which is crucial for preventing hammer follow (where the hammer follows the bolt forward before the bolt is fully in battery). Tuning Flexibility: The second, even stronger, silver spring allows for further adjustment and fine-tuning of the cycling speed, catering to different AR platforms and calibers. Optimal Performance: By offering these two spring options, Franklin Armory aims to ensure that the BFSIII trigger system can be optimized for a wide range of AR builds and shooting scenarios. Cheers and stay safe!

what im asking would it work on a db 10

Hi John, I would contact Diamondback for an accurate answer (321) 305-5995 | (877) 997-6774 or email info@diamondbackfirearms.com Stay safe & have a great day!

Hi John and welcome. Typically AR15 triggers are compatible with AR10s. The problem is that AR10 platforms are not mil-spec so the manufacturers may have some proprietary intricacies that may affect your particular firearm's ability to accept AR15 parts.

I'm curious will this work in a FN 15 M4 Military Collector 223 Remington/5.56 NATO Semi Auto Rifle?

Hi Nike and welcome. this will work in the FN 15 M4 Military Collector 223 Remington without issue. Cheers, stay safe and enjoy!

This will absolutely fit and function properly as intended.

Hi Nike, Franklin Armory says " Works in most AR platforms and calibers including 5.56 NATO, 308 Win, 300 BLK, 9mm, Rimfire, etc.... * Compatible with most Bolt Carrier Groups (BCG) Trigger pin size is.154" No 80% lowers, No polymer lowers, No Carbon lowers Stay safe & have a great day!

Does this include complete install kit, ie buffer springs and pins

yes everything is included see time 1:10 https://www.youtube.com/watch?v=aKLkSW1dnUQ

Hi Anthony, everything you need is included, including enhanced buffer springs for optimal flexibility. You can see a picture of all the components you will get here https://redcon1tactical.com/franklin-armory-ar-15-bfsiii-ar-s1-binary-firing-system-trigger-titanium-nitride-straight.html Stay safe & have a great day!

Hi Anthony and welcome. Yes, complete install kit is included. Installation video here : https://www.youtube.com/watch?v=aKLkSW1dnUQ ------- Cheers and stay safe!

What caliber is this trigger meant for?

Lyman, the trigger is not caliber specific, it will work in any AR15 lower. Have a great day!

any AR lower caliber does not matter

This will work in any Standard AR15 Lower. Binary triggers are kind of cool but honestly I like the "Graves Automatic Reset (A.R.T) Trigger is much faster and more controllable. https://www.recoil-technology-systems.com/graves-v2-art.html#/ ------------------ Or the Rarebreed FRT15 https://www.rarebreedtriggers.com/ ------------------ Or the Rise armament RA535. https://risearmament.com/product/rise-armament-ra-535-trigger/

Lyman, this will work in any caliber AR lower receiver. The trigger is not caliber dependent. Cheers and stay safe!

BUD’S NEW SITE IS COMING SOON CLICK HERE BUD’S NEW SITE IS COMING SOON CLICK HERE BUD’S NEW SITE IS COMING SOON CLICK HERE BUD’S NEW SITE IS COMING SOON CLICK HERE

budsgunshop.com uses cookies to ensure you get the best experience. Details can be found in our Privacy Notice.

Got It!

BFSIII AR-S1 Binary trigger

Name: BFSIII AR-S1 Binary trigger
Brand: Franklin Armory
SKU: 723008217
Availability: OutOfStock
Rating: 5.00 (2 reviews)

Questions & Answers (7) Reviews 5 out of 5

**Mouse over image above to zoom any area, or click on image to zoom the entire image.

BFSIII AR-S1 Binary trigger firing system straight BFSIII AR-S1 Binary trigger firing system straight Straight trigger

Out of Stock

MFG: Franklin Armory

Model: 5645A

Bud's Item Number: 723008217

UPC: 818725011450

NOTIFY ME WHEN AVAILABLE

Retail Store Availability

In-Store Purchase Only
Lexington, KY	Not in store
Greenville, KY	Not in store
Sevierville, TN	Not in store

2 Reviews

BFSIII AR-S1 Binary trigger

BFSIII AR-S1 Binary trigger firing system straight BFSIII AR-S1 Binary trigger firing system straight Straight trigger

Operators Manual

2 Reviews. 5 out of 5 Stars!

5 Stars

100%

4 Stars

3 Stars

2 Stars

1 Star

SORT BY:
Most Recent | Highest Ratings | Lowest Ratings

Write Review

Aaron L on 09/26/2025

Rating: 5 of 5 Stars!

Talk about a adrenaline rush! This is a must have! Must experience!

Juandomingo S on 04/16/2023

Rating: 5 of 5 Stars!

Wow, just the perfect toy to have fun!!!

Write Review

Questions & Answers

Q: Why is there two buffer spring in the package? So whats the difference?
Answered

Asked 03/13/2025 05:58 by Vlademeir P

A:

Per the manufacturer... "to provide flexibility in tuning the firearm's cycling speed and recoil for optimal performance with different AR platforms and calibers."
See 1 more answer |
Q: Will this work on a ( ATI Alpha Maxx 5.56 NATO Semi Auto Pistol )? And is this legal in PA?
Answered

Asked 03/12/2025 10:26 by Bryheim J

A:

Yes & Yes!!!
Q: what im asking would it work on a db 10
Answered

Asked 07/30/2024 21:35 by john p

A:

Hi John, I would contact Diamondback for an accurate answer (321) 305-5995 | (877) 997-6774 or email info@diamondbackfirearms.com
Stay safe & have a great day!
See 1 more answer |
Q: I'm curious will this work in a FN 15 M4 Military Collector 223 Remington/5.56 NATO Semi Auto Rifle?
Answered

Asked 01/21/2024 16:32 by Nike A

A:

Hi Nike and welcome. this will work in the FN 15 M4 Military Collector 223 Remington without issue. Cheers, stay safe and enjoy!
See 2 more answers |
Q: Does this include complete install kit, ie buffer springs and pins
Answered

Asked 01/08/2024 01:38 by Anthony G

A:

yes everything is included see time 1:10 https://www.youtube.com/watch?v=aKLkSW1dnUQ
See 2 more answers |
Q: What caliber is this trigger meant for?
Answered

Asked 09/12/2021 22:52 by Lyman G

A:

Lyman, the trigger is not caliber specific, it will work in any AR15 lower. Have a great day!
See 3 more answers |

Receive Money Saving Offers

Enter your email address to receive our best deals and other store updates.

Conditions of Use • Privacy Notice

BFSIII AR-S1 Binary trigger

Questions & Answers

Q: Why is there two buffer spring in the package? So whats the difference?

Q: Will this work on a ( ATI Alpha Maxx 5.56 NATO Semi Auto Pistol )? And is this legal in PA?

Q: what im asking would it work on a db 10

Q: I'm curious will this work in a FN 15 M4 Military Collector 223 Remington/5.56 NATO Semi Auto Rifle?

Q: Does this include complete install kit, ie buffer springs and pins

Q: What caliber is this trigger meant for?

Receive Money Saving Offers

Catalog

Information

Partners

SUBSCRIBE AND SAVE!

GET EVEN MORE!

THANK YOU!

BFSIII AR-S1 Binary trigger

Description

Similar Items

Product Documentation

(2 Reviews) Rating 5 out of 5

Questions & Answers (7 Questions)

Questions & Answers

Q: Why is there two buffer spring in the package? So whats the difference?

Q: Will this work on a ( ATI Alpha Maxx 5.56 NATO Semi Auto Pistol )? And is this legal in PA?

Q: what im asking would it work on a db 10

Q: I'm curious will this work in a FN 15 M4 Military Collector 223 Remington/5.56 NATO Semi Auto Rifle?

Q: Does this include complete install kit, ie buffer springs and pins

Q: What caliber is this trigger meant for?

Product Videos

Receive Money Saving Offers

Catalog

Information

Partners

SUBSCRIBE AND SAVE!

GET EVEN MORE!

THANK YOU!