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Questions & Answers
Will this fit an HK MP5 22LR Expert Answer

Yes, the Franklin Armory BFSIII HK-C1 Trigger - Binary Firing System for HK 91/93/MP5 should work with the HK MP5 22LR.

by Hunter, Gear Expert, April 12, 2022
Does this include the ejector bar? Manufacturer Answer

No, the HK-C1 does not include the ejector, you re-use the ejector, ejector spring, and pin from your OEM trigger pack.

by Franklin Armory, Manufacturer, June 4, 2025
Customer Reviews
Helpful Positive Review
I purchased this binary trigger for my MKE/Century Arms MP5/AP5. I installed it the same day it arrived. Delivery was faster than I expected. Read the instructions and it was easy to install. Not as complicated as the video online from Franklin A...
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1/1 found this helpful
Helpful Positive Review
There isn't much to say here in terms of function: the unit is simple in design and works flawlessly. It is built quite well and comes with extensive instructions for the moderately advanced user. Be aware that this is intended for "semi-auto" conver...
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22/23 found this helpful
Helpful Positive Review
Great piece by Joe, April 30, 2020
Works great for the price. Came pretty quickly. Was packaged well. It was also fairly easy to put on. Recommend for those who want to shoot full auto, but also want the option to go back to semi. Very easy to find safety as well.
3/9 found this helpful
Helpful Positive Review
Franklin armory binary trigger by Gl, December 30, 2020
Trigger is very easy to install and works great, fun to shoot. The only negative is the ambi safety made of plastic Safety controls arent very positive and feel cheap and flimsy All around great and would recommend to a friend
6/6 found this helpful
Helpful Positive Review
BFS II Trigger by Bill, June 17, 2019
Got this for my HK MP% clone. On sale I got it at OP for a lot cheaper than it is sold elsewhere. Great trigger, I love it. Dropped right in my gun. My only negative is that for a trigger at this price point, it should come with the extractor, spr...
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12/12 found this helpful
Helpful Positive Review
you will love it by chas, Verified Owner, January 30, 2021
this is alot off fun and it fast as well i love it and you will to it takes about 10 mins to install then it go time lol get it today dont miss out on buying it you i put about a 2000 rounds in 1 weekend and it worked really good
6/6 found this helpful
Read All 19 Reviews

Save BIG on Select Franklin Armory Triggers this Holiday Season!

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Trigger Shape: Traditional Curved Trigger Pull Weight: 4.5 lbGun Make: Heckler & Koch Gun Model: Heckler & Koch HK91 , Heckler & Koch HK93 , Heckler & Koch MP5 Condition: New

Code: 2G2-BIN-FABFS3HKT-05-50000-BLK

MPN: 05-50000-BLK

UPC: 818725011436

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List: $699.99Save 15%
$597.99

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Product Info for Franklin Armory BFSIII HK-C1 Trigger - Binary Firing System for HK 91/93/MP5

The Franklin Armory HK Binary Firing System III HK-C1 Trigger is a three-position trigger that boasts it's the fastest semi-automatic trigger on the market. These Rifle Triggers by Franklin Armory is ideal for both tactical and competitive use with greatly reduced split times between rounds. In position 1 this Franklin Armory 3-Position Trigger is safe and will not fire, in position 2 it fires one round per pull, and in position 3 it fires one round on pull and one round on release. Compatible with most AR platforms and calibers and works with any BCG, this Franklin Armory BFSIII Trigger is a must have for all shooters!image

WARNING: California`s Proposition 65

Specifications for Franklin Armory BFSIII HK-C1 Trigger - Binary Firing System for HK 91/93/MP5:

Manufacturer: Franklin Armory
Trigger Shape: Traditional Curved
Trigger Pull Weight: 4.5 lb
Gun Make: Heckler & Koch
Gun Model: Heckler & Koch HK93, Heckler & Koch HK91, Heckler & Koch MP5
Gun Type: Rifle
Condition: New
Adjustability: 3 Positions

Features of Franklin Armory BFSIII HK-C1 Trigger - Binary Firing System for HK 91/93/MP5, 2G2-BIN-FABFS3HKT:

  • A trigger pull around 4.5 pounds.
  • Ambidextrous Safety Selector.
  • Safety Selector will fit in most two and three position trigger housings.
  • Works in SP5K housings.
  • Trigger housing, ejector, ejector pin and ejector spring are not included.
  • Will fit most HK 91, 93, & MP5 variants and clones
  • Some firearms may require additional fitting

Package Contents:

  • Franklin Armory BFSIII HK-C1 Trigger - Binary Firing System for HK 91/93/MP5

Franklin Armory BFSIII HK-C1 Trigger - Binary Firing System for HK 91/93/MP5 Orderable Models

List of Orderable Models

  • Franklin Armory BFSIII HK-C1 Trigger, Binary Firing System for HK 91/93/MP5, Curved, Black, 05-50000-BLK , MPN: 05-50000-BLK , UPC: 818725011436 , Code: 2G2-BIN-FABFS3HKT-05-50000-BLK

Franklin Armory BFSIII HK-C1 Trigger - Binary Firing System for HK 91/93/MP5 Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, Franklin Armory BFSIII HK-C1 Trigger, Binary Firing System for HK 91/93/MP5, Curved, Black, 05-50000-BLK , MPN: 05-50000-BLK-DEMO , Code: 2G2-BIN-FABFS3HKT-05-50000-BLK-DEMO
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