TM 5.1 gas spewing

[ILLusion]

Did you soak it in silicone oil? A lot of newbie upgraders end up bathing the hop up rubbers in silicone oil, with the belief that oil is good for the gun, and that "more is better."

Too much silicone oil will actually damage the hop up rubber. Unknown to most airsofters, the rubbers are not 100% inert to silicone oil and will actually absorb it if too much is present, causing the rubber to swell. A tiny bit to ease installation is okay. A couple drops in your gas tank to keep rubber seals from drying out is okay.

Any more than that is too much, and can cause deformities like you guys are describing.

Generally, if you must use a lube to install a hop up rubber, it's better to use a silicone based grease, rather than oil.

[turok_t]

Hmm i didnt use any oil at all when installing my barrel in my hop up chamber and it still looks pouty for some reason.. It seems like everytime when i install it, im having difficulty in fully closing the 2 chamber halves. However, when i use the stock TM rubber, the 2 halves close completely...im going to try and refit it again..

[Slono]

Originally Posted by turok_t

Hmm i didnt use any oil at all when installing my barrel in my hop up chamber and it still looks pouty for some reason.. It seems like everytime when i install it, im having difficulty in fully closing the 2 chamber halves. However, when i use the stock TM rubber, the 2 halves close completely...im going to try and refit it again..

If you didn't use any oil while installing, maybe you got a lot of oil on it some other way. I just found out that the new firefly bucking i put on was a lot smaller than the other one I had the pouty lip. When did you get yours? Maybe they made a whole bunch that were defective and we both got one.

Edit; I remember getting oil on the inside of mine because I put too much oil on the seal of my mag, and when I fired it, oil got all over. I had to clean it twice before the BBs would stop rolling out of the oily rubber.

[turok_t]

Originally Posted by Slono

If you didn't use any oil while installing, maybe you got a lot of oil on it some other way. I just found out that the new firefly bucking i put on was a lot smaller than the other one I had the pouty lip. When did you get yours? Maybe they made a whole bunch that were defective and we both got one.

Edit; I remember getting oil on the inside of mine because I put too much oil on the seal of my mag, and when I fired it, oil got all over. I had to clean it twice before the BBs would stop rolling out of the oily rubber.

I got my hop up in January from ehobby asia, maybe their batch was different than the ones everyone has right now. The thing is, i just installed my firefly hop up recently and test fired my gun. I had no more than 20 shots firing through it so there shouldnt be alot/any oil at all. Maybe i should try dipping it in warm water with a bit of soap detergent to clean any residual oil. Anyways, i got another firefly hop up coming so im hoping it will be better.. BTW, where did u get your smaller firefly hopup from?

[Slono]

Originally Posted by turok_t

I got my hop up in January from ehobby asia, maybe their batch was different than the ones everyone has right now. The thing is, i just installed my firefly hop up recently and test fired my gun. I had no more than 20 shots firing through it so there shouldnt be alot/any oil at all. Maybe i should try dipping it in warm water with a bit of soap detergent to clean any residual oil. Anyways, i got another firefly hop up coming so im hoping it will be better.. BTW, where did u get your smaller firefly hopup from?

I got mine from ILLusion several months ago and only installed it this january. I don't know where he got it from. I'm almost quite sure that this rubber was hard to fit into my gun when I first got it so I want to say that it was a certain batch that these came from that were bad. I got another one recently in an order from redwolf and that's the correctly fitting one I have right now.

[turok_t]

Originally Posted by Slono

I got mine from ILLusion several months ago and only installed it this january. I don't know where he got it from. I'm almost quite sure that this rubber was hard to fit into my gun when I first got it so I want to say that it was a certain batch that these came from that were bad. I got another one recently in an order from redwolf and that's the correctly fitting one I have right now.

Well, my first one was from ehobbyasia. My next one coming will be from Tokyo Model Company.. I hope its in the good batch. I will definetely be reporting my results in this thread.. By the way, the hopup that im referring to is the SOFT one by firefly.. Firefly has a HARD, SOFT and SUPER SOFT if i am correct.

[Slono]

Originally Posted by turok_t

Well, my first one was from ehobbyasia. My next one coming will be from Tokyo Model Company.. I hope its in the good batch. I will definetely be reporting my results in this thread.. By the way, the hopup that im referring to is the SOFT one by firefly.. Firefly has a HARD, SOFT and SUPER SOFT if i am correct.

Yeah, mine is soft as well.

[StrikeFreedom]

I notice that my Firefly soft rubber (from Brian) is larger than the stock rubber, and it fits on the inner barrel pretty loosely. Like others have experienced, the over sized rubber is squished inside the hop up chamber. As a result the opening (where BB comes in) and the top v-notch turns to a weird shape. Also, it tends to grab/pull out the loading nozzle so much that it fails to spring back. Is this a defective Firefly rubber then?

[turok_t]

Originally Posted by StrikeFreedom

I notice that my Firefly soft rubber (from Brian) is larger than the stock rubber, and it fits on the inner barrel pretty loosely. Like others have experienced, the over sized rubber is squished inside the hop up chamber. As a result the opening (where BB comes in) and the top v-notch turns to a weird shape. Also, it tends to grab/pull out the loading nozzle so much that it fails to spring back. Is this a defective Firefly rubber then?

Does it create a lip since the rubber is larger??

[StrikeFreedom]

Originally Posted by turok_t

Does it create a lip since the rubber is larger??

Yes, and it's noticeably over-sized. How did you fix yours?

[turok_t]

I didn't, I got a new one..

[ILLusion]

Originally Posted by StrikeFreedom

I notice that my Firefly soft rubber (from Brian) is larger than the stock rubber, and it fits on the inner barrel pretty loosely. Like others have experienced, the over sized rubber is squished inside the hop up chamber. As a result the opening (where BB comes in) and the top v-notch turns to a weird shape. Also, it tends to grab/pull out the loading nozzle so much that it fails to spring back. Is this a defective Firefly rubber then?

What lubrication are you using with the rubber?

I've seen three instances of these Firefly hop up rubbers swelling. The first, was when Superlube Oil was used directly on it. The second, was when excessive silicone oil was used (ie, the rubber was DRENCHED, along with everything else around it). The third time, Canadian Tire "Silicone Spray Lubricant" was used on it.

I regularly use these rubbers from the exact same batch I sell to you guys and I haven't experienced any problems yet. All hop up rubbers need to be installed by seating the entrance in first before placing in the barrel. When the top half of the hop up rubber is closed, again, it follows from the entrance first over the rest of the body. By doing so, the entire hop up rubber is contained within the edge of the hop up rubber and it will not cause the "pouty lip" you'll get by just jamming it in.

Secondly, are you running with a short stroke setup? If not, your setup SHOULD force the nozzle to release from the hop up rubber (it's normal for it to catch in the rubber).

[StrikeFreedom]

For installation, I simply match up vertical slot on the barrel with the rubber, then slide it in until it meets the horizontal slot.

Again the rubber is noticeably larger than the stock rubber, so I believe this is the reason for all the squishing inside the chamber. I never lubed the rubber. I did however washed it with soap water, as it is recommended by some. Is that what enlarged/swelled it? If so, can I shrink it by putting it in cold water/frig?

[turok_t]

Originally Posted by StrikeFreedom

For installation, I simply match up vertical slot on the barrel with the rubber, then slide it in until it meets the horizontal slot.

Again the rubber is noticeably larger than the stock rubber, so I believe this is the reason for all the squishing inside the chamber. I never lubed the rubber. I did however washed it with soap water, as it is recommended by some. Is that what enlarged/swelled it? If so, can I shrink it by putting it in cold water/frig?

Hey, what I also tried is to use a small phillips screw driver or tweezer and manipulate the pouty lip once it is enclosed in the 2 chamber halves. I basically tried to pull up the pouty lip until the opening is circular. Give that a try and tell me what you think.

[StrikeFreedom]

Pushing it up doesn't help, the rubber sinks down right after. I might as well use stock rubber (at least for now) since the over-sized Firefly rubber fits loosely onto the barrel and is squished inside the chamber which may ruin the air-seal and accuracy.