[e-luder]

I take no credit at all. You did the work and you fixed your gun. Not me.
Pat on the back sir. Pat on the back.

noticed at the top of the magazine, the rubbery part is completely flat, unlike my mags that have the top rounded. I expect this is wear from the nozzle.

I don't think that's the case here. That magazine is brand new and should not have worn off that much that quickly. Plus, if what you're suspecting holds true, then that new magazine should've caused a jam with the loading arm on your loading nozzle. There would have been too much of the "rubbery part" wear off initially thus would have over-protruded causing a jam.

I suspect that the flat "rubbery part" is how WE has manufactured these replacement magazines. Though I see no visible advantage nor reason as to why they would have two designs for the same magazine.

here's how AG pictured it:



that looks like a flat gas route packing to me.

In theory, If the spring gets 100% compressed with a slide cycle, the power of the spring should not increase because the o rings have just shifted its placement

Correct. If you want a better, crispier slide cycle get a stiffer spring. The Shooter's Design recoil spring is pretty strong. It's 150% in strenght but is much stiffer than the guarder ones because it has less coils. Most of guns have this spring installed and most of them are shortstroked because the power of the spring is too much.

Short stroking the gun will give you a better gas consumption though. heh. so all is not lost.

Next I plan on disassembling my lower receiver to install the trigger bar. Is there a step by step instruction guide anywhere online? Are there any pieces that are very troublesome to look out for?

there are many youtbe videos on these. just simply look one up that caters to your preference.

Here's one:
Tokyo Marui Glock 17 Full Take Down/Disassemble (HD QUALITY) - YouTube

I want to replace the sights on my glock with nights sights, have you tried the big dragon?

I wasn't aware that Big Dragon made sights for TM Glocks so no i haven't used one.

But I have used the Big Dragon fiber optic sight system for my KSC G18c before. From my experience, you can probably get a better version. These sights are for the budget minded airsofters.

The fiber rods are poor on the KSC sights. hardly any good use out of them before they just decided to fall off of the sight.

But keep in mind, this was a KSC version sights I owned.