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I'm after a flash light for the lower rail of my TM G17, budget isn't really an issue but I want value for money, ideally in the £50 region. But willing to pay more if its worth it, an obviously happy to pay less if £50 isn't worth it. There are so many clones about its hard to know where to...

Yes it would seem your right!  So I have put the stock unit in, with a maple leaf rubber and a new nub. Now shooting at 330 consistent. So leaving it there. I did sand back the ZCI hop unit to get it closed to the nozzle which did increase the fps to 320 ish from 300. But couldn't take any more...

Another update, took it all apart at lunch to remove the delay chip, after that test firing 20 ish bbs the first shot was 330 then all 300, first time I have seen 330 on this spring.  Now convinced that the gear box can do 330, i concluded it must be a nozzle/hop interface, so rebuilt that ZCi...

Thanks Adolf and  Ad, Some good points to look in to tomorrow. Something else I have just thought of, there is a sector delay chip in there, which I can't belive is needed, so will try removing that tomorrow as I could be keeping the nozzle from making a good seal at the right time....maybe...

Thrust bearings being on the spring guide and piston? Masada has no bearings, just a washer/shim on spring guide. 416 has a bearing on the spring guide, so theoretically, in my head the 416 should have higher fps if all else were equal. While I think about more trial and error tomorrow, is...

Solid logic, that said my rudimentary test suggests it's got amazing air seal even at very low speeds. Will put the bigger spring back in tomorrow,  minus a coil and see how that does!

Update: I wanted to check the m100 spring in the full cylinder...Still only gets 300fps, and that was only after rebuilding the hop unit as initially I was getting 160ish!  There is still something I don't understand! A spring that gets 370 in the masada gets 360 in the 416. The M100 gets 330...

That's very kind of you. I have a few spare springs....and have now solved the problem! I put a bigger spring in the gun, that got 370 in my masada, still got 300 in the 416....so as it turns out... The issue was the ported cylinder! The stock cylinder has a port at 4/5s ( my guess). I didn't...

Thanks you for your reply, Yea I know its not apples with apples, I was just wondering if I should be trying to "fix" the air seal more before putting a bigger spring in.  Barrel length and cylinder are stock - can't remember where the port is on the cylinder or even if it has one- will check...

aha, update, changed the hop rubber for a maple leaf i had, 306fps! so looks like the nozzle didn't like the ZCI hop rubber! So now I'm at 306- the question is is that ok on a ZCI m100 spring that gets 330 in my masada? I know there are variables such as barrel length, which is very similar and...

I have done the blow down the barrel- was fine all held air well. How do you check the nozzle outward travel? Neither hop units have o rings to the nozzle so i guess the seal there is never going to be perfect? How do i check if the nozzle is reaching the hop rubber? do I have to take apart the...

Both, the spring helped a small amount -270ish fps. the new hop unit dropped fps to 220 ish ( done some tinkering since the 204 above but obviously still not great)

That spring seems to be doing a good enough job at pushing the hop unit back, but the fps with the new unit took a bit hit, must be a hop unit/nozzle interface I think, not sure what to do about it though.

So, update for you all... First I tried the large spring on the standard hop unit - that wouldn't fit, I couldn't close the 2 receivers when fitted, to much material in the way even when fully compressed - option to cut spring down is still there. Second the small spring on standard hop unit...

Thanks again guys :) Does the SHS HT use Neo magnets? Seemed to be so cheap i assumed it didn't!  -also are these the same as Rocket Motors? This really makes me want a warhead motor! As mentioned by Iceni, when using a fast motor he gets double firing, I have had this too when using a high...

Hi Guys,  I'm looking to upgrade the motors in 2 of my guns:  My main gun -PTS masada. Which I'm happy to spend a fair amount on if the diffence is noticeable. Which pulls a M105 spring and 13:1 gears. Priority is efficiency and semi response.  2nd gun is G36. This is just a back up gun but...

I have a similar issue, unfortunately I can’t offer much useful advice but would like to follow to see what is causing yours.  I have the issue with SHS high speed motor with 13:1 gears, now swapped for 16:1 gears. Basic gate mosfet with no AB. It could just be these motors? I should note, I’m...

Thanks guys!  I have ordered the hop unit as suggested.  Will update you when I have it installed! Thanks again Also ak2m4... never heard of it before.  But looks amazing best airsoft shop I have found online!  Will used them again! 

I think this is it! Looks like the bottom type of spring as there is a small knob for it to sit on! Than you again

Thank you both for the replys, Iceni, I'm new to the forum, but have been ti kering with guns for a while. Fully Aware the BBs I used for testing were blaster devil 0.2s. Which was the same ammo I used to validate the spring in masada. Thank you though appreciate the time and and handy chart to...