Lozart

Bit of both. In the UK the extremes of temperature aren't actually that extreme so much like you I've had no need to change rubbers purely because of environmental issues but I have seen a couple of my guns that perform poorly first thing on a winters day after having been packed in the car overnight on account of the rubber stiffening up in the cold. I'd personally say that there's FAR more difference in personal preference as far as the UK goes. If you drastically change the power of the gun or the weight of the BBs then you'll probably see more of a difference with grades of rubber than just the difference of a few degrees between an average winter and summer here (climate change notwithstanding of course) but even then it may just be down to longevity. The very anecdotal nature of airsoft "upgrades" is a problem so I (much like yourself) would love to see an actual, evidence based test much like the AATV style of video that does a back to back of the same three rubbers in the same gun on the same day and then repeated in deep midwinter and the height of summer to see just how much variation there actually is. Of course, as soon as you take the results and apply them to your own gun it all goes out the window (at least to some degree) because your gun ISN'T the gun the test was done with (even if it's the same model and manufacturer).

Absolutely correct but the discussion was about comparing three different grades of the same make and type of hop rubber in the same gun on the same day to see how much difference the hardness of the rubber itself actually makes.

The Krytac P90 is has both an electronic fire control unit and a MOSFET. The Perun P90 does not fit in a Krytac P90 (ie not a drop in fit but could probably be fettled in). Also - to address the MOSFET/ETU thing - a MOSFET is strictly just a transistor, not a chip. Unfortunately, much like Hoover, MOSFET has become an accepted term meaning some kind of electronic device fitted to an airsoft gun. Perun's MOSFET is a MOSFET with additional components on a circuit board, the Krytac MOSFET is even more basic in that is just the transistor (so you can truly say that it's just a MOSFET). A "programmable MOSFET" is a massive misnomer, it's a MOSFET with a programmable controller attached which may or may not be an ETU as well (eg Warfet vs ASTER).

It's really not. You've basically captured the essence of how it works in what you've said! The different hardness of rubbers is akin to when Pirelli rock up to an F1 race weekend with a 3 out of 5 selection of tyres (rated as C1 to C5). On a given day at a particular track a race car will have a finite amount of grip on any one type of tyre so let's say that on this particular day with a track temperature of say 40C it's the C3 tyre that gives the best grip. For that same car at the same track with a lower track temperature then a softer tyre will be better (eg the C1) on a hotter day you'd need a harder rubber to get the same grip (eg C5) because the hotter conditions will make the rubber deform more for a given speed/turning force. The same is true for hop rubbers. On an average UK day a 60 degree rubber in a 350FPS gun firing a 0.28 bb will give good hop. In the same gun with the same power and same BBs in a winter game in Norway it won't give enough so you need a softer rubber. Likewise, take the same gun to a summer game in Florida and you'll need a harder rubber. The tricky part is accounting for the variables in the gun itself - spring rate consistency, gearbox stiction, air seal, the stability of the hop unit (flex in the arm, deformation of the tensioner etc) bore quality in the barrel, all of which will have an effect in the consistency of the results. All the "marketing" is different companies trying to resolve the variations because airsofters want something that is reliable and consistent. The reason why there IS no consistency is that every manufacturer works to their own tolerances and goals and airsofters by and large are too dumb/gullible to work that out so you end up with what started out as a perfectly reasonable standard gun "upgraded" with loads of shiny bits from different manufacturers, none of which actually work properly TOGETHER.

First things first - check that it's actually straight in the hop unit.

It's literally like any other launcher. The video actually says that the iron sights are useless at giving enough elevation to get any useful range but that the sight mount will which again, is no different than any other launcher.

OH YES IT IS!

Actually, Ron it's THREE cars welded together.

But that's just what a scammer WOULD say!

One of my buddies has one and I've had to work on it. Decent guns until they break and then there's a bunch of proprietary parts that make life a bit complicated. They only really like their own hop unit and the gearbox is shaped in such a way that they only really fit their gears (which isn't entirely an issue as they are pretty tough). Some programmable mosfets won't fit/work because of the way the gearbox is. The pistol grip can be a bit fragile so make sure not to screw it in too hard if you have to take it off, the PTS EPG is a very good replacement though.

He's done it on guns with standard gearboxes but not a Krytac P90.

Snake brushes are plastic coated because they have to go around bends. Now, unless your barrel is more fucked than any cleaning rod will fix as long as the diameter of the brush stem is less than the bore of the barrel it won't come into contact with the barrel surface anyway. Or literally just use a bore snake for a .22 rifle.

All plastics are polymers, not all polymers are plastics (DNA for example is a polymer). As @Sewdhull mentioned some manufacturers started using "polymer" instead of plastic because of the negative associations people have with plastics in terms of durability. The plastic that Glock uses is a trade secret but most people seem to think it's either DuPont Zytel or something very similar which is just plastic reinforced with glass fibre. Some airsoft manufacturers haver followed suit and started using glass reinforced plastics after ABS proved to be less than ideal for receivers (old TM M4's for example) and picked up on the use of "polymer" as a marketing differentiator because the vast unwashed masses neither understand the difference or care because they're led to believe that "polymer is better than plastic" when it's actually "glass fibre reinforced nylon is better than ABS". As to @TheFull9's point, I very much doubt that "influencers" understand what they're saying as most of the time they're just repeating what the marketing blurb says, so at best they're perpetuating a lack of understanding and at worst misleading buyers. That said, the market will support itself at the lowest common denominator so is it really the manufactures/influencers who are at fault or the buying public for just not making themselves aware?

Surely that's exactly how it's easy to mislead someone?

Technically, technically, polymer and plastic are not the same thing. That said, all the bits of airsoft guns that aren't metal or wood are very definitely plastic and the people that say their polymer gun is betterer can indeed get fucked.

It's definitely CCW (being Tokyo Marui and all). Seeing as they designed the flash hider to be reversible I'd be amazed if it's threadlocked on. Sounds to me more like it's cross threaded!

Looks more like the Russian arctic stuff to me The urban camo stuff that OP has is near enough, maybe a bit too much grey but we're not looking for an exact match!

I get that, and I know there are products on the market that work that way but surely coming from the tank into a manifold and then two separate regulators must be cheaper than having three regulators? You're basically talking about a lump of metal with three holes in it!

Different to, different from and even different than are all fine as far as the Oxford Living Dictionary is concerned. "Different than" of course will immediately single one out for ridicule as being rather American.

Worth a look here: https://www.femmefataleairsoft.co.uk/search?q=plate+carrier The LBX 0300S seems to be a decent choice.

Surely you could go tank > Manifold > Regs > Lines? Why would you need an additional regulator for the tank?

Pretty sure it has something to do with the whole "made in Russia" thing...