This video will show you where / how to find the new weapon Prototype 17 (Glock) in RUST. Below are all P17 spawn locations and chance rate:
1) Airdrops (10% spawn chance)
2) Patrol Helicopter (1% spawn chance)
3) Bradley Tank (1% spawn chance)
4) Locked Crates (7% spawn chance)
5) Elite Crates (1% spawn chance)