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Tech index -> Invert Mini

The Invert marker is a newcomer to the market. It features a very small body size, making a lightweight setup, as well as a simplistic design that employs no hoses and minimal parts. As with most other high-end markers, it also features a high rate of fire, adjustable trigger and board setup, reasonable efficiency and consistency, etc.

The design is based from a 2006 marker known as the King Cobra from the Taiwanese company JBS. The Invert Mini is very similar to the Cobra, except for the main support features of the design which have been further developed. For example the electronics are built differently, the design of the body is new, firing assembly size is reduced, and some other changes. The main difference is that the Cobra's air chamber has been relocated to the middle of the Mini's frame, which drastically reduces the body size. This, coupled with a few other major changes, constitutes the Invert Mini.

Disassembly pictures

More info coming soon.

O-ring Diagrams:
I've measured some of the generic seals used in the marker, however many of them aren't standard 1/16" width rings (common in most other markers) so it's difficult to extract the exact size of some. The items listed in the below diagrams with a question mark (?) are sizes I've measured out but am not totally sure of. For some others, I have no idea what size they are (haven't measured). If you have an addition or clarification to these diagrams, let me know and I'll add it.

The tan colored bumper o-ring is the same size as the smaller o-rings located on the front of the bolt guide (I think they're 14.5x1.5-mm ID as noted in the picture).

These are the miscellaneous seals in the marker. A lot of them are 1-mm high metric seals but I don't know the exact dimensions.

Upgrades:
I've noticed there are a few companies already selling aftermarket bolt replacements, using different materials and modified shapes. These are perfectly fine upgrades in essence, however you do have to be aware of exactly what you're buying. As usual there's a lot of hype being put out for these parts, most of which has to be taken with a grain of salt.
· Lightweight: The advantage of this is lower recoil. That's all. Lighter bolt mass doesn't increase the marker's cycling speed, this is the same for many guns out there and is a massive misconception. The bolt's speed is limited by how quickly pressure can vent on the spring side; this has nothing to do with the bolt's mass. It's simply pushed forward as quickly as air can vent.
· Bolts made from delrin aren't "self-lubricating". You will still have to lubricate your bolt. The material doesn't matter.
· Delrin bolts, although they may feel vicerally "slicker" on the outside, doesn't mean your spring wear will discontinue. The spring is still going to wear against the side of the bolt, the difference is scratches on delrin aren't as noticeable. The amount of wear won't go down with softer materials.