The self-contained Valken First Strike AR-1 HPA airsoft rifle is now available... The revolutionary AR-1 is a self-contained high pressure airsoft rifle. Truly the first of it's kind, this AR/M4 platform is ready to skirmish out of the box. With an included 13/3000 Tank/Stock combo there is no need for bulky bottles, remote lines, or even second stage regulators. AR-1 is truly 100% self-contained.