Ad_

Found these while going through some old backups from years ago.

My Tokyo Marui P90, my favourite & one of my oldest guns. Doesn't look much different to stock externally, but it's had a few upgrades: G&P metal upper receiver Prometheus 6.03 barrel, Prometheus purple hop rubber, AirsoftPro "stability snob" Guarder air seal nozzle, Guarder steel cylinder head, Guarder chromed cylinder Guarder polycarbonate piston with Systema Area 1000 aluminium piston head Guarder SP90 spring Prometheus bearing spring guide Systema oilless metal bushings Prometheus hard cut-off lever Stock motor & gears Wired with a basic MOSFET (IRF2804, used to have an active braking MOSFET module fitted but replaced it as it made the main spring make a "boing" noise after firing whenever it was fired on semi auto), blade fuse, Deans connector Does a little over 330fps

Built mine a few years ago now: Case: Corsair Carbide 330R Blackout Edition PSU: EVGA SuperNOVA 750P2 Mobo: ASRock X370 Gaming K4 CPU: AMD R7 1700 (mild overclock @ 3.7GHz) with Noctua NH-U12S cooler RAM: Corsair Vengeance 16GB GPU: Sapphire RX480 Nitro+ 8GB Storage: 1TB Samsung 970 EVO NVMe SSD, 6TB WD Black HDD, 1TB WD Black HDD OS: Linux Mint 19.3 Mouse: Logitech G203 Keyboard: Filco Majestouch-2 (Cherry MX Brown keyswitches) Monitor: Dell U2412M (24" 1920x1200 IPS)

Biodegradable BBs should get broken down by microbes present in the soil and various chemical processes into other materials. What they break down into and how long this process takes will depend on what exactly they're made of though, as well as the environment they're in. PLA is quite commonly used: https://en.wikipedia.org/wiki/Polylactic_acid Regular plastic will gradually break down in the environment too, but only into smaller pieces of plastic.