Glock introduces the Connector 5 for Gen4 pistols


From left, 4.5lb (minus), 5.5lb (standard), 5lb (Connector 5)

When Glock’s largest customer asked for a lighter trigger on their Gen4 22 and 27 pistols, the company responded by producing a new trigger connector that splits the difference between the 4.5 pound (minus) connector and the 5.5 pound (stock) connector. The new part is called the Connector 5 and was designed to lighten the trigger pull on Gen4 pistols purchased by the Bureau of Alcohol, Tobacco and Firearms in September 2010.

During testing, the ATF found the Gen4 trigger a little heavy. “The new connector was designed to give our customer the exact trigger pull they wanted,” explains William Carmichael, Glock’s Technical Services Supervisor, “which is 5 to 5.5 lb trigger pull.”

The ATF wanted a trigger that didn’t go above 5.5 pounds. With the standard trigger connector in the Gen4 pistols, Carmichael explained, the trigger pull ranges from 5.5- to 6.5 pounds on the majority, never dipping below 5.5 pounds. The ATF tried the 4.5 connector (a.k.a. the “minus” connector) but found it too light.

Looking at the Gen3 and Gen4 internals, one can see the shape of the the trigger housings differ. The Gen4s are scalloped to accommodate the thinner grip of the new frames. This change slightly increased the pitch of the connector and resulted in a heavier trigger pull in Gen4 pistols. The Connector 5 brings the angle of the connector back in line with that of the Gen3 pistols and reduces the trigger pull by about a half pound.


From left, 4.5lb (minus), 5.5lb (standard), 5lb (Connector 5)

Glock put out the new part just after SHOT Show 2011. Because of its origin, the part was informally dubbed the ATF Connector. It’s also been called the dot connector since it’s identified by a dot peened on the back of the connector’s hook. But, it’s officially now named the Connector 5. So looking at the back of the connectors, no marking means it’s a 5.5-pound connector, a “+” marking means it’s an 8-pound connector, a “-” is a 4.5-pound connector and a “.” denotes the new 5-pound connector.

At first, the new part was only installed in the ATF contract guns, but Glock decided to make the Connector 5 stock for all models of Gen4 pistols shipped after May, 2011. All Gen3 pistols will continue to ship with the unmarked 5.5-pound connector.

The part is available to agencies through their regional Glock representative. Individuals that would like to get the Connector 5 have a few options. They can ship their pistols to Glock for warranty service, find a certified Glock armorer that will perform the swap or go get to a GSSF match where a Glock service rep is usually on hand to perform free tune-ups to Glock pistols on a walk-up basis.

I haven’t gotten to the range with the new connector, yet. But, dry fire feels great. Side by side with my Gen3, the triggers feel almost identical. The 2nd stage wall is much lighter than it was with the 5.5  and the reset still pops like a balloon caught between a pair of horny porcupines. I had been running the minus connector, but it always felt a little mushy. This really dials the trigger in and I haven’t even messed with polishing.


About Author

No Comments

  1. “With the standard trigger connector in the Gen4 pistols, Carmichael explained, the trigger pull ranges from 5.5 to 6.5 pounds…”

    Sounds like numbers pulled out of thin-air. All the Gen4 guns I’m familiar with have come with 8 to 8.5 lb triggers from the factory. I put a Glock factory “-” connector in mine and dropped it to a consistent 6.5. It’s still heavier and now squishier than I like.

    If this Connector5 drops a half pound, then I’d expect it to put Gen4 guns somewhere in the 7-8 lb range. I can’t wait to see if or how it changes the trigger feel.

  2. FormerSFMedic on

    Stock connector, minus connector, it doesn’t matter. Glock triggers are heavy and sloppy no matter what connector you run. Striker fired pistols have a flawed trigger design, and the Glock is no exception. If the ATF wants a better trigger, they will need to do a lot more than replace one part. I’m not knocking the Glock, quite the contrary. I carry one everyday. My trigger is setup to break at exactly 4.0 lbs with a 3.0 lbs takeup and almost no overtravel. I achieved this by tweaking all the trigger parts in a very specific way. One thing I would have suggested to the ATF, something that Glock doesn’t condone, would be to run the NY1 trigger spring with a ghost rocket 3.5 lbs connector. The result is amazing, and would still give them a 5 lbs trigger pull with a much smoother takeup and cleaner break. Of course they would never do this, because Glock doesn’t like this setup and the agents aren’t truly masters of their weapons. Oh well.

  3. +1 to FormerSFMedic. I have been running a NY1 trigger with a match connector in my Gen2 G17 for over a decade now. Result is similar: +/- 5.5 lb. pull with a lot of the mushiness removed.

  4. @FormerSFMedic: Are you running that setup in a Gen4?

    It think the Connector 5 gets the Gen4 90% of the way without gunsmithing– which had to have been their aim. Agents don’t have time to become “masters of their weapons”. They are investigating and preventing crime. Sure, they train and become proficient combat marksmen, but they don’t have time to mess with the internals of their pistols. Nor would any sane agency manager want to put that responsibility into the hands of agents that might be exceptional investigators, but are mechanically un-inclined.

    To look at it another way, just because you use the copy machine in your office everyday doesn’t mean your boss wants you to be the guy that fixes it.

    Aside from the LEO market, lots of people with Gen4s have messed with Ghst Rockets, trigger springs, safety springs, trigger bars and even firing pin springs alone or all together trying to either replicate the feel of the Gen3 trigger or simply “improve” their Gen4 triggers.

    This gets those people almost the whole way there with one drop-in part.

Leave A Reply