G&P M4/M16 Hop-up not fitting in M4???

[RadioMan]

Hi I bought a G&P M4/ M16 Hop-up unit to be installed in my JG M4 (JG Thundermaul) I brought my gun to Xtreme Tactics in Winnipeg to have it installed. A few weeks later I got my gun back, with the original hop-up still installed with a note saying "costumer purchased wrong item, hop-up could not be installed". I clearly bought M4 hop-up, but they say it doesn't fit...

Here is the link to the hop-up I bought: http://www.airsoftparts.ca/store2/in...roducts_id=304

Does it actually not fit? Or did the gun tech just not know it is compatible?

EDIT: The same thing above happened with this item: http://www.airsoftparts.ca/store2/in...oducts_id=1317

Is there anything I can do to make them fit?

[AngelusNex]

requires cutting and modding to fit a 1 piece hop up into an m4 with a 2 piece (Tm and JG models) The tech should have been able to do it but probably didn't want to start cutting if he wasn't sure you knew exactly what had to happen.


The sorbo cylinder head will fit.

[Gunman]

RadioMan,

You purchased the wrong hop up unit. Yes they are both for M4 series, however there is a huge difference between a one piece hop up unit and a two piece (different manufactures use different hop up designs). The one piece hop up chamber you purchased is made for a Classic Army or G&G (and others) body style of M4.

Like AngelusNex said, our tech won't do anything like modifying without your acknowledgement. Once a part is modified, it cannot go back to the way it was, and if modified incorrectly that part would be absolutely useless. Modifying is more so a desperate last attempt if nothing off the shelf is available. Most people would just end up buying the proper part to have it installed.

As for your sorbo pad, our tech has tried numerous attempts with it. The installation part wasn't hard, however the sorbo added just too much of a spacing to your piston causing your gun not to function properly. In the end the tech decided that removing it was the only logical solution. Additional time spent on it would only cost you more as you are paying him by the hour. In fact I recall him billing you less then what he actually spent time on the gun as he didn't feel you should have been billed for him trying time and time again to figure out why the sorbo wouldn't work.

[Amos]

Hey there, If you'd like I can modify your lower receiver and piston to accept both the G&P hop-up unit and the sorbothane pad

PM sent.

Originally Posted by Gunman

Modifying is more so a desperate last attempt if nothing off the shelf is available.

There's a guide on how to do it that comes with Prometheus NEO strike 1 piece hop-ups. They were designed to replace TM style 2 piece hop-up units. It involved dremaling out parts of the lower receiver, but it's very do-able.

As for the sorbothane pad, you're supposed to remove the last tooth on the piston to allow proper engagement of the sector gear.

Edit: Oh wow I just realized this is 4 months old

[Gunman]

Amos,

Bryan has installed Sorbo's before. We are talking about a guy that works on an average of ten guns per shift (both rentals and customer guns). So at no point am I doubting his ability to do his job.

If you read my post again, I stated that "our tech won't do anything like modifying without your acknowledgement". And that includes any sort of modified parts (to the piston or hop up in this case). It doesn't matter how "easy" or extensive the modification is. A modification is still a modification and not all customers are comfortable with having their parts (either new or used) modified. We put our word behind our work and warranty our services. A "custom"/Modified job could potentially conflict with us in the future. I don't know how you charge your clients, but we bill by the hour, not by the job. If it requires us more time to do a modification, that time is billed on the customer as well.

ie. a customer forgot that he got us to modify his piston. He ends up selling the gun down the road and the new owner decides to tinker around with it and realizes that the piston is missing a tooth. That person would go back to the seller and complain about this and eventually end up back to us because we are the only ones that has worked on the gun. Some people don't care for an explanation, they just want someone to blame.

I also speak from experience as well, as we have had techs in the past that would do "whatever it takes" to get the guns up and running (ie. customizing parts to fit). And we are still dealing with/hearing the backfire from it today.