Firearm configuration where the action and magazine are located behind the trigger, reducing overall length while maintaining barrel length.

A firearm feed system where ammunition is stored in a separate container (magazine) that can be removed and replaced, enabling rapid reloading.

Firearm action type where expanding gas from a fired cartridge cycles the mechanism, typically via a piston or direct impingement.

Uses high-pressure gas to cycle the action, rather than recoil energy.

Integral bipod: a permanently attached, built‑in bipod that provides a two‑point support for a firearm, allowing it to be rested on a surface without separate accessories.

A mounting system for attaching optical sights to rifles.