FFT charging handle pops out, RX arms?

[SuzukiGS750EZ]

I saw a video from RX Arms where the charging handle looks like it locks into place with authority. I have the 3/4” FFT and when I charge the gun (or eject shells rapidly) it will sometimes rotate out. Is it just nature of the beast or are there better designs than the FFT?

[RxArms]

We have a different design, with a detent hole that has positive engagement with the detent to prevent rotation once the detent has popped into place.

I should mention that lately the past couple years some detents on Benelli M4s suffer from less than adequate spring pressure, and our handle can be rotated out with enough force.  I have an older 2013 m4 where the detent has great pressure and I couldn’t rotate the handle with all my strength, my newer 2020 M4 has a detent that does not have the same detent pressure.   At the same time I have a lot of customers with new M4s that the handle locks on great.
 

I am sure some users here will chime in.

Edited October 18, 2023 by RxArms

[Scout_21]

Unfortunately nature of the beast. I have 3 m4s and the engagement differed between all three. It must be a pia to try to design something that can deal with such a large variance 

Edited October 18, 2023 by Scout_21

[SuzukiGS750EZ]

I can’t physically pull it out without rotating it and the original part was somewhat difficult to remove so I think the detent itself is ok.

 

RX arms, what causes yours to be different design wise? Each I see physically look the same. Also, do you screw the aluminum knob to the steel shaft or is it held in place another way?

[nyc71]

I have both FFT & RX Arms neither rotates but I prefer the latter, looks & feels better. 

[SuzukiGS750EZ]

I ordered an RX. Hoping it’s the ticket. I also bought the titanium one which I’m hoping with less diameter is less rotation. And it’s titanium!

[Ben elLes]

The FFT handle I ordered sat flush with the receiver.  Had I shot it, it would have dug a gouge all up and down the slide action

[RPC]

On 10/20/2023 at 6:42 PM, SuzukiGS750EZ said:

I ordered an RX. Hoping it’s the ticket. I also bought the titanium one which I’m hoping with less diameter is less rotation. And it’s titanium!

Just placed an order for one also, appreciate you asking the question.

[SuzukiGS750EZ]

night and day difference between the RX arms and FFT. Not even a comparison. The FFT in 2 out of 3 of the detent positions  I could turn a crazy amount and it was very easy to twist out of place. The RX arms design is much different, positive retention and hard to turn to twist out. No way will this part come out even if I’m racking the bolt under pressure.

[RPC]

Mine arrived today, had time to throw it on and manipulate it a bunch.

@SuzukiGS750EZ Your BCG detent ball & spring may be different/stronger than mine but the RX Arms charging handle spins more easily for me. Once disengaged from the detent it pulls out effortlessly. 

It’s impossible to pull out while the detent is engaged, but with gloves on it’s not hard to imagine getting spun accidentally while charging and disappearing.

Curious why the difference.

That said, the knurling, length and diameter are amazing in hand.

[SuzukiGS750EZ]

30 minutes ago, RPC said:

Mine arrived today, had time to throw it on and manipulate it a bunch.

@SuzukiGS750EZ Your BCG detent ball & spring may be different/stronger than mine but the RX Arms charging handle spins more easily for me. Once disengaged from the detent it pulls out effortlessly. 

It’s impossible to pull out while the detent is engaged, but with gloves on it’s not hard to imagine getting spun accidentally while charging and disappearing.

Curious why the difference.

That said, the knurling, length and diameter are amazing in hand.

Did you get the titanium one? Trying to turn it clockwise (when facing it) is near impossible for me. Spinning counter clockwise takes a good bit of effort. 

[RPC]

1 minute ago, SuzukiGS750EZ said:

Did you get the titanium one? Trying to turn it clockwise (when facing it) is near impossible for me. Spinning counter clockwise takes a good bit of effort. 

Yeah, ordered this one. I push it into the BCG until it stops then rotate it to match a detent to the detent ball. 

I don’t have a gauge that can measure the effort to spin mine, but I threw the stock one back in as a baseline and the Rx one spins as easily if not more easily. 

[SuzukiGS750EZ]

13 hours ago, RPC said:

Yeah, ordered this one. I push it into the BCG until it stops then rotate it to match a detent to the detent ball. 

I don’t have a gauge that can measure the effort to spin mine, but I threw the stock one back in as a baseline and the Rx one spins as easily if not more easily. 

That’s a bummer. My RX one is awesome. Maybe my FFT would work in your BCG lol it didn’t in mine.

[RPC]

20 minutes ago, SuzukiGS750EZ said:

That’s a bummer. My RX one is awesome. Maybe my FFT would work in your BCG lol it didn’t in mine.

Talking with Robb on the side about the Rx handle. I think this is the 4th order I’ve placed from him, never been anything but completely satisfied. Hoping to understand why this different retention in mine even if it ends up being something uncontrollable. 

[RxArms]

The detents on the Benelli M4 are not completely consistent.  Which can cause problems at times, which does not happen often in my experience.  Unfortunately this is how the Benelli m4 is.  Kind of hit and miss, (Much more hit than miss).

[RPC]

2 hours ago, RxArms said:

The detents on the Benelli M4 are not completely consistent.  Which can cause problems at times, which does not happen often in my experience.  Unfortunately this is how the Benelli m4 is.  Kind of hit and miss, (Much more hit than miss).

Variances are a reality any manufacturing environment. Got a couple additional ideas, the Rx charging handle is otherwise too nice for me to just put it in a drawer with the others. 

[dragun_slinger]

Im aware this is an old thread but I recently had this happen with the EXACT charging handle (FFT 3/4) during firing and thought this was interesting. 

I was shooting standard buckshot and after the bolt locked back on the final round I noticed the charging handle was missing. I found it after 5 minutes of scrambling on the ground but made me reconsider going back to the OEM handle.

[xblax619]

i think its possible with any charging handle had it happen with the rx handle i used to run as well as the taran tactical v2 i’m currently running. it didnt happen with the oem or the 3/4 fft though admittedly i didnt have those on very long. 

[dragun_slinger]

True, it seems like I have read about it happening at least once to most of the popular brands. 

[Gmcrigger2007]

I have the RXARMS handle and I like it .

[SuzukiGS750EZ]

I’ve continued to have great luck with the RX Arms

[m4prime]

On 10/18/2023 at 12:54 AM, SuzukiGS750EZ said:

I saw a video from RX Arms where the charging handle looks like it locks into place with authority. I have the 3/4” FFT and when I charge the gun (or eject shells rapidly) it will sometimes rotate out. Is it just nature of the beast or are there better designs than the FFT?

I actually have your charging handle (I love it by the way, have beaten on it hard and it has held up great). I bought a second one because I thought perhaps the cut out was worn as the charging handle was beginning to spin out when charging aggressively with gloves. It even came out on accident a couple times while being carried to the car. I put the new one in, nothing really changed. 

 

What direction would you suggest I go next? I know it's not your charging handle due to trying another brand new one as well as the OEM one.

[Kahamu]

I like RxArms products, but I did have their charging handle "fall" out while pulling back on the bolt (I noticed I was slightly pulling outward while pulling back). The OEM does not have this issue, so I've decided to swap back to prevent an inadvertent lost charging handle.

[SuzukiGS750EZ]

On 11/14/2025 at 10:15 PM, m4prime said:

I actually have your charging handle (I love it by the way, have beaten on it hard and it has held up great). I bought a second one because I thought perhaps the cut out was worn as the charging handle was beginning to spin out when charging aggressively with gloves. It even came out on accident a couple times while being carried to the car. I put the new one in, nothing really changed. 

 

What direction would you suggest I go next? I know it's not your charging handle due to trying another brand new one as well as the OEM one.

I've had the RX Arms charging handle in my M4 now for 2 years with zero failures. The FFT charging handle has sat in a box unused since then.

The only thing I wish RX Arms did with the handle was to make it just like the OEM so you can use it for disassembly.