The factory is now assembling the M5 XDC. The M5 XDC comes standard with the one piece aluminum upper with side BRH, our famous Hybrid Combat Stock, 4 Hybrid Mags and a 14 inch Marksman Predator Barrel. Like the SMG, the M5 features the super durable all aluminum DERP system to retain the HEAT Core. Best of all is the new low price.



  • Inline BRH
  • HCS Stock
  • Predator Barrel
  • 4 x Hybrid Mags
  • Mechanical Full Auto 12.5 BPS
  • 4.75" Hand Guard (Compatible with other AR hand guards)
  • SMG Pistol Grip (Compatible with other AR pistol grips)
  • Trident Bolt (Does not require Alignment) 
  • FSR - Ready (Accepts all square head mags)
  • Fully Ambidextrous (selector switch and mag release) 
  • A5 Threaded Barrel (7/8" Diameter) 

Internally, the M5 uses our D.E.R.P. (Dynamic Exo Retention Platform) to contain the HeatCore™ in one functioning mechanical housing. This means that the internals of the marker can be completely removed and operated independently of the marker body. This allows for a fast transition between marker bodies. Keeping in mind that the SMG and the M5 use the same D.E.R.P. Housing, this continues the evolution of the ability to easily swap the ‘core’ of a marker between various bodies.

With the D.E.R.P. Platform now available for over 2 years, we’re overjoyed to say that on a worldwide scale, less than 1/10th of a percent of SMG’s sold have ever graced our presence for service, making this our most reliable platform ever, and perhaps the most reliable platform inside the MagFed market.

Due to the rigid stabilization of the D.E.R.P., the extreme consistency of the HeatCore is improved to a standard +/- 2FPS deviation. Consistency effects the repeated trajectory of projectiles (FirstStrike or .68 Cal). This means that the higher the consistency of your marker, the closer together each individual shot will land. Consistency = Accuracy.
As always, MILSIG Markers all include our unreasonably simple, Patented Mechanical FullAuto system. With only a single point of adjustment, MILSIG’s Mechanical full auto is pretty fool proof, being simple to tune and maintain.

Holding true to the M-Series title, the M5 is made from CNC machined aluminium upper receiver, paired with our steel reinforced polymer lower, creating an extremely durable, yet lightweight platform.

The Trident bolt is the latest and greatest in HeatCore™ Bolt technology that requires no alignment or service throughout it’s lifespan. There will never again be a day where you need a special tool to service a bolt. You can simply ignore this step of maintenance now.

Selection is said to be the spice of life. We like selection, and we bet you do to. So the M5 Magnus model comes out of the box supporting AR-15 Barrel Nut threading for shroud mounting. The sky is the limit now with access to an arsenal of thousands of different shroud options that can be matched with any 7/8” OD barrel.

Features, Features and more features. Adding to a whole list of firsts, the newly designed magazine well from the M5 integrates a dual index ambidextrous release. This means that there is a release button in the index finger position on both sides of the magazine well. Coupled with an ambidextrous selector switch, this is a truly dual handed marker, allowing seamless transition between left and right handed shooting positions.

Additionally, this dual magazine marker allows the use of all square head magazines with room for future magazine options. It is a continual goal to support the players that purchase our markers for as long as possible. MILSIG would be nowhere without everyone that has supported us along the way. Maintaining backwards compatibility is always an important goal. We’d rather not make a new magazine that forces you to get rid of everything you already have.

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