Atlas Custom Works PK-4 Picatinny Small Storage Foregrip $300 Mystery Box A: The Hostile XLP is

A: The Hostile XLP is an adjustable HPA regulator that lets you fine-tune output pressure from 40-150 PSI

milsim loadout

Removable Visor

It also includes a convenient small storage compartment inside the grip for keeping small tools

it will not allow firing

Atlas Custom Works PK-4 Picatinny Small Storage Foregrip $300 Mystery Box A: The Hostile XLP isWhat's Included? 1x Atlas Custom Works PK 4 Picatinny Small Storage Foregrip (Black) Mounting Hardware (Allen Key) What you need to use it This vertical foregrip is ready to install on any standard 20mm Picatinny rail. Align the grip with the rail and secure it using the included Allen key through the two mounting slots. It provides a comfortable vertical grip with the added benefit of a small internal storage compartment for tools or small parts.