To access the interior, simply remove the thumb screws holding each of the panels in place. The interior of the Flyer is black regardless of the external color variant you have picked. The metal shroud inside the case is certainly a nice touch given the retail price of the enclosure. Here, you may for some unknown reason install two 120 mm fans if you like. Montech even provides the screws, but as the shroud offers no openings, there is essentially no point. However, considering the low cost of the chassis, one cannot expect to get extras like additional SSD trays here, so in reality, this is no real loss either. On the backside of the motherboard tray are some well-placed, large hooks for zip ties around the center, but I would have loved to see some more in the front of the enclosure as well. None of the openings come with grommets, which may again be forgiven considering the price point of the Flyer. On the upside, all the cutouts are well place and should be pretty useful for cable management,
Inside the front you will find another sturdy 120 mm fan. It is nice to see two cooling units inside the Flyer out of the box, but I would have personally been fine with just one if Montech would have used the freed up bill of materials to go for a glass panel. In the front, you may also install two SSDs to show off in your build. Underneath the shroud is a basic HDD cage for two 3.5" storage units. It requires you to utilize screws on one side, while the other goes for rubber-ring-equipped screws that slide in. That part in the front of the case is a solid part of the chassis frame, which also explains why Montech did not provide an opening in the shroud for bigger cooling setups.
The 120 mm exhaust fan in the rear is of the same brand and model as the one in the front. Below that are the four expansion slots, which come with classic screws for securing any GPUs and other parts. Underneath the shroud, the PSU bay is quite basic, also lacking any kind of foam or rubber tips as an anti-vibrations measure. But let's be real for a second: odds are extremely high PSU vibration won't be an issue anyways these days.
In the ceiling, you can clearly see the mounting possibilities for cooling and how far these are from the motherboard. If you look closely, you will see that the mounting holes align with the rear fans, which means there is just as much space at the board backplate for larger heatsinks.
All the case and I/O cables within the Montech Flyer are of the default variety with the exception of the USB 3.0 lead. This one also comes with a USB 2.0 header should your motherboard not offer a 20-pin 3.0 plug. Unfortunately, both fans are equipped with a Molex plug and will run at full 12 V no matter what you are doing with your system. The third Molex plug is for the RGB LED element in the front of the chassis. Montech really needs to go with 3-pin fans and a SATA connector for LED power in my humble opinion.