ARES GXR-35 Gas Piston Retrofit Kit Inventory Clearance

ARES GXR-35 Gas Piston Retrofit Kit
ARES GXR-35 Gas Piston Retrofit Kit Inventory Clearance
ARES Defense Systems
ARES Defense Systems

Melbourne, FL -( ARES Defense announces a special inventory clearance opportunity for obsolete -marked GXR-35 Gas Piston Retrofit Kits for AR15/M4 Carbines.

These gas-piston retrofit kits are laser engraved with ARES’ original legacy logo and GXR-35 brand, both of which were replaced with ARES’ current logo and GXR brand for its patented gas-piston retrofit kit. These kits are otherwise virtually identical in every way to the current GXR kits, but with obsolete markings and are designed to directly replace a standard carbine length gas tube with its piston and op-rod components.

The patented bolt carrier is a single-piece design with anti-tilt features and an integral impact lug for maximum performance. Manufactured of aircraft grade alloy and heat treated to exact specifications, it is phosphate coated for a non-glare finish and laser engraved with company logo and brand.

“This is a great opportunity for anyone wanting to economically upgrade their direct-impingement gas system with a reliable gas-piston operated system,” says Geoffrey Herring, President-CEO of ARES Defense. “These kits feature our patented single piece, anti-tilt bolt carrier and gas tube swap out components that were proven in a grueling 10,000-Round torture test.”

These GXR-35 kits are available 3 ways and are first come, first served while inventory lasts:

  • GXR35-001: Complete kit, minus handguard – Clearance Price $199.
  • GXR35-002: Complete kit with MagPul MOE handguard – Clearance Price $219.
  • GXR35-003: Complete kit with DiamondHead VRS handguard – Clearance Price $269.

To take advantage of this limited opportunity, please call (321) 242-8410 M-F, 9:00am-5:30pm or email to [email protected]

DEALERS: Please contact us for additional discounts and quantity pricing.

ARES GXR-35 Gas Piston Retrofit Kit
ARES GXR-35 Gas Piston Retrofit Kit

About the ARES Defense GXR Gas-Piston System:

Now in its 10th year of production, the patented GXR set the standard for customers wishing to economically convert their direct-gas impingement carbines to a reliable gas-piston system without removal of the factory front sight housing. Instead, the GXR simply replaces the factory gas tube and bolt carrier common to most AR15/M4 carbines with a robust, short stroke tappet system and patented anti-tilt bolt carrier with integral impact lug. The result is a cooler, cleaner and more reliable operating system over the legacy direct-gas method of operation found in most standard AR15 or M4 carbines.

Benefits of the GXR Gas-Piston Retrofit Kit:

  • Cleanliness: The most obvious benefit of converting an AR15 or M4 carbine to the GXR gas-piston system is that the externally venting piston energizes the bolt carrier by the action of a steel pusher rod, thereby preventing excess propellant gases and heat from entering and fouling the action of the weapon or vaporizing its lubricants.
  • Performance: The patented high-mass bolt-carrier with anti-tilt features inhibits receiver and buffer tube wear that exists with many other gas-piston products. Additionally, the GXR gas cylinder contains the metering orifice that regulates the amount of gas necessary to operate the weapon. Since the GXR’s metering orifice is actually smaller than the original gas port in the host weapon’s barrel; a weapon assembled with the GXR gas-piston system will usually experience a reduced cycle rate than the weapon previously displayed, unaffected by the potentially eroded port of the original barrel and extending its service life. The patented high-mass bolt carrier supplied with the GXR kit offers a longer dwell time to unlock the bolt, providing sufficient time for the chamber pressure to drop to acceptable levels and an opportunity for the obturated cartridge case to contract from the chamber wall for reliable extraction.
  • Longer Weapon Component Life: A high cycle rate as experienced with gas port erosion may cause premature and sometimes catastrophic failure of critical weapon components. Accordingly, the slower cycle rate provided by the GXR may extend weapon component life over the legacy direct-gas system.
  • Cost and Safety: The GXR can be retrofit to almost any AR15, M16, XM177, CAR-15 or M4 carbine without requiring replacement of the entire weapon or upper receiver assembly. Retrofitting to the OEM upper receiver means that the original upper receiver, bolt, barrel and barrel extension remain the same as was originally supplied with the host weapon, which ensures that the weapon’s head-space and the pedigree of these critical safety components are not compromised with parts of unknown origin.
  • Compatibility: The GXR is rearward compatible to the very first M16’s procured by the US Government during the Vietnam War, meaning that virtually any AR15, M16 or M4 weapon can benefit from the GXR gas-piston upgrade.
  • Low Risk and Easy Installation: The GXR is readily installed in approximately 10 minutes without the need to remove the weapon from service and the procedure is completely reversible in the event that one wished to sell their carbine in its original direct-gas configuration and install their GXR Gas Piston Retrofit Kit into their next carbine.
  • Accuracy: Weapons configured with the GXR retain near pre-conversion accuracy.

Product Specifications:

  • Caliber: 5.56mm NATO
  • Weight:  Gas expansion assembly weighs 2.5 oz over legacy gas tube
  • Barrel Length Compatibility: 10” – 16”
  • Handguard Compatibility: Magpul MOE, DiamondHead VRS, Daniel Defense Gas-Piston Omega, others
  • 100% Made in the U.S.A.
  • Patents: US 7,779,743 – US 8,056,460 – US 8,109,193 – US 8,166,864

About ARES Defense:

Since its founding in 1997, ARES Defense Systems has focused on the development of military small arms and accessories of unique versatility, innovation and exceptional quality for military, law enforcement and commercial customers. Engineered and manufactured with the highest quality American-made materials, ARES products are produced on state-of-the-art CNC machining centers in an ultra modern facility by a highly skilled workforce.
Headquartered on the USA’s Space Coast, ARES’ intense dedication to mission critical innovation has resulted in numerous patented advancements resulting in lighter, stronger, better performing weapons and accessories for the operator. Follow ARES Defense on Facebook at and on [email protected]

To learn more about ARES Defense Systems visit

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Hoang Nguyen

Just need to know do you have this kit in stock.



Richard Hostetler

Do you have any of the ARES gas piston kits for carbine length barrel in stock? and if so how much?


I know this was posted some time ago, but might you have any of these in stock?