Introducing the X-91 Drum Magazine for HK-91 / PTR-91 Pattern Rifles — a purpose-built 50-round .308 / 7.62x51 NATO drum engineered to transform your rifle into a true support platform without sacrificing reliability, handling, or durability. Inspired by the legendary German G8 drum concept, the X-91 combines massive firepower with a compact footprint that stays low to the rifle and performs exceptionally well from the bench, bipod, or prone position.
Unlike bulky polymer drums or oversized dual-stack designs, the X-91 utilizes X Products’ ultra-compact single-stack coil system, delivering smoother feeding, reduced overall height, and improved balance. The result is a drum that is easier to handle, easier to store, and more dependable under hard use.
The drum body is precision die-cast aluminum for maximum strength and weight reduction, while critical internal components are CNC billet machined for consistent tolerances and long-term durability. The follower system utilizes high-strength glass-filled nylon engineered to withstand heavy cyclic loading and prolonged storage while maintaining reliable cartridge alignment and feeding.
Because the X-91 uses a die-cast aluminum body, minor cosmetic surface pitting or texture variations may occasionally be visible. These are normal characteristics of the manufacturing process and do not affect function, reliability, or structural integrity in any way.
The X-91 is finished in a durable Cerakote ceramic coating that resists corrosion, abrasion, and harsh environmental conditions. Its self-lubricating internal design eliminates the need for oil or grease and allows the drum to remain loaded long-term without spring degradation or loss of reliability.
Built for shooters who demand maximum capacity without compromise, the X-91 is ideal for:
Every X-91 is proudly manufactured and assembled in the USA and backed by the X Products No-Hassle Lifetime Warranty.
Compatible with most:
X Products X-Series drum magazines pioneered the modern aluminum drum magazine platform. Originally developed in 2005 and in continuous production since 2009, the X-Series became the first commercially available aluminum drum magazine utilizing an ultra-compact single-stack coil system.
Tested by military personnel, law enforcement, competitive shooters, collectors, and prepared citizens, the X-91 was built to survive real-world abuse while delivering the firepower advantage that made the platform legendary.
When 20 rounds isn’t enough, the X-91 changes the equation.
