Neat - PTW Hopup for M4 AEGs

[Mitchell12]

MORE moving parts? No thanks. Great explanation though guys!

[mcguyver]

Originally Posted by Mitchell12

MORE moving parts? No thanks. Great explanation though guys!

No, actually less. There is only 1 moving part in a PTW hop-up.

I don't think you know how a Ver2 hop-up is built. Tear one apart and see, I mean every little pin, each gear and the lever.

Like this, and this does not include the hop-up bucking, sleeve or barrel:

[m102404]

THIS is the link to the PDF manual...

The step by step of how the PTW hopup works is on pg 15

[m102404]

Video of installation

YouTube- Broadcast Yourself.

[coach]

I like this design. with a standard hopup, as the bucking presses against the sleeve and inturn the BB, the BB also presses against the opposite side or the sleeve which I would assume causes friction against the BB minimizing the full effect of the bucking.

Though I may be wrong, I can only assume on this design that the roller system can introduce more spin since it is continuing to press on the BB as it passes by. more positive contact is made between the BB and hopup for a longer period of time creating more spin.

[Donster]

why not just save the money and buy an SCS upgrade for standard AEG hopups?

[m102404]

That's the jist of it, yeah.

The Systema PDF of the M4 manual has a really nice step by step.

Now...I think there was a bunch of comments like the roller on the cage was moving inconsistently or it was getting chewed up easily (if you've never seena PTW misfee, it's truely something to see BBs sprayed out like confetti).

But I think the design is a good one...and I've seen more than a few PTW's shoot nicely, so it's working.

I don't know if it's better than regular hopups...(well, I do, but I can't really back that up with much proof).

[coach]

Originally Posted by Donster

why not just save the money and buy an SCS upgrade for standard AEG hopups?

nothing. I'll put them in my non AR AEG's when I get around to changing the current hopup's. read below.

not really much to save up for though. lol

Originally Posted by m102404

I don't know if it's better than regular hopups...(well, I do, but I can't really back that up with much proof).

I'd be willing to try it though. to prove or disprove it. it's all about options.

I can't see this design exploding, well cracking and falling apart, in colder temps like mine have in the past. even with an all metal standard hopup unit, the gears tend to be the weak point and fail if the sleeve doesn't freeze and split on you.

[m102404]

The weakest point of it is the very bottom corners of the cage. Remember in the vid when the dude was putting the two black bumpers in...he's putting them in between the bottom of the cut-out in the barrel and the inside of the cage.

The corners of the cage are actually recessed to give the bumpers somewhere to sit and the material is thin there. Now...I've not broken one in normal use...but others have broken theirs by trying to lessen the hopup, cranked on the allen key when it's bottomed out and then cranked on it some more.

The cuts of the barrel actually stop it for being raised any further. On my PTW the cage couldn't be raised enough...way too much hop applied with it "off". But about 30sec with a file on the cuts of the barrel and the cage now raises higher and my PTW shoots sweet.

There's replacements available and I think there are CNC'd ones as well (real CNC).

[coach]

good point. I'll have to remember to pay attention to that area when I get my hands on one. it's amazing what a little modding can do.