FN America Mid Range Gas Gun (MRGG)

Do you love the FN SCAR? Interested in what is essentially a variant, or at least a close relative of the SCAR? Then you’re going to love the FN America Mid Range Gas Gun (MRGG) line. The MRGG lineup from the respected gun maker is currently made up of two rifles, the MRGG-A and the MRGG-S.

FN American MRGG
The FN America MRGG is, as its name suggests, a Mid Range Gas Gun. Although it has some SCAR-like features it is definitely a new model in its own right. (Photo credit: Soldier Systems)

The launch of the FN MRGG-A and MRGG-S was initially reported by Soldier Systems, who wrote:

Offered in two variants MRGG-A for Assault and MRGG-S for Sniper Support. The most glaring differences between the two variants are a 14.5″ barrel for MRGG-A and 20″ MRGG-S as well as different pistol grips and buttstock for the two versions. However, the side-folding adapter fits with an M4 standard buttstock so the shooter can configure the stock as he sees fit.

Controls are ambidextrous. Additionally, only MRGG-A offers full-auto fire. Otherwise, it’s semi and safe selectors for both, but it is more ergonomic than on the SCAR. There’s also a two-stage trigger which was designed in house.

FN Mid Range Gas Gun
The FN MRGG is designed for combat and is available as a full-auto or sniper model. (Photo credit: Soldier Systems)

Features of the guns include:

  • AR-style top-mounted charging handle
  • Non-reciprocating side charging handles
  • A combination forward assist and brass deflector
  • FN’s own two-stage trigger
  • Height adjustable bipod
  • Barrel lengths specific to their purpose (14.5 inch on MRGG-A and 20 inch on MRGG-S)
  • Compatible with SR25 magazines
  • Full-length MIL-STD 1913 Picatinny Rail
  • M-LOK compatible as well
  • Adjustable gas block
  • Suppressed and unsuppressed settings on gas block
  • HUXWRX Safety Co. suppressor
  • Cold hammer-forged barrel
  • Highly customizable stocks and interchangeable barrels
  • Available in 6.5 Creedmoor and 7.62x51mm NATO
  • MRGG-A ships with a Gen 3 Vortex Razor 1-10×24 optic and a Badger C1 mount and Leupold Delta Point Pro backup sight
  • MRGG-S ships with a Gen 2 Vortex Razor 4-27×50 optic and a Spuhr 4002 mount with FN ELITY
The side-folding adapter on the FN MRGG fits with an M4 standard buttstock
The side-folding adapter on the FN MRGG fits with an M4 standard buttstock so the user can configure it to their specific needs. (Photo credit: Soldier Systems)

Interestingly, Soldier Systems also noted that there’s an “adjustable gas block with suppressed and unsuppressed settings while the Gas Regulator is now buried in the receiver assembly and redesigned to reduce flash while shooting under NODS.” This is a fantastic feature for FN to include in the MRGG’s design. From their high-quality overall design to the thought that obviously went into the controls, it’s clear FN created these rifles to be the ultimate combat-oriented Mid Range Gas Guns.

FN MRGG receiver and controls
A look at the receiver and controls of the FN MRGG. (Photo credit: Soldier Systems)

Limited information is available regarding the FN MRGG-A and MRGG-S at this time. Stay tuned for more details as they become available.

What do you think of the MRGGs? Could FN eventually win the SOCOM contract that’s still up for grabs? Share your thoughts in the comments section below.


Kat Ainsworth Stevens is a long-time outdoor writer, official OGC (Original Gun Cognoscenti), and author of Handgun Hunting: a Comprehensive Guide to Choosing and Using the Right Firearms for Big and Small Game. Der Teufel Katze has written for a number of industry publications (print and online) and edited some of the others, so chances are you've seen or read her work before, somewhere. A woman of eclectic background and habits, Kat has been carrying concealed for over two decades, used to be a farrier, and worked for a long time in emergency veterinary medicine. She prefers big bores, enjoys K9 Search & Rescue, and has a Master's Degree in Pitiless Snarkastic Delivery.


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