Viper Sniper - HPA mod : r/Nerf

FR-1 Pit Viper- the Pink Viper : r/Nerf

The not so short, short gun : r/airsoft

EMG / SAI Licensed AR-15 GRY HPA Training Rifle w/ JailBrake Muzzle (Configuration: SBR / Black / PolarStar F-1), Airsoft Guns, HPA / Electro-Pneumatic - Airsoft Superstore

HPA AWP Asiimow Retaliator : r/Nerf

Nerf Mod: Vanguard Nerf gun with a HPA Tank! The Highest FPS Nerf Gun?

Viper Sniper - HPA mod : r/Nerf

Worker Viper Style Mod Kits Set for Nerf N-Strike Retaliator – JGCWorker

ARES MSR303 Quick-Takedown Airsoft Sniper Rifle (Color: Dark Earth), Airsoft Guns, Air Spring Rifles - Airsoft Superstore

Lever action VSR10 in it's final form : r/airsoft

Type 64 Scope Suggestions : r/airsoft

Worker Swift in full sniper mode : r/Nerf

Umarex REKT OPFOUR CO2 Powered Foam Dart Rifle (Red)