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G&P / Polarstar Full Metal M4 R3 HPA Powered Airsoft Rifle with 14.5" Keymod MRE Handguard

ID: 76233 (HPA-GP-JAK003)
GP-JAK003 - Mlok
G&P859188762336GP-JAK003 - Mlok76233
5.0 stars, based on 2 reviews
G&P / Polarstar Full Metal M4 R3 HPA Powered Airsoft Rifle with 14.5 Keymod MRE Handguard
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Optic and HPA tank NOT included. All guns ship with federally mandated orange tip
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This item is currently Sold Out

MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.
Canada Export CompliantCanadaExport Compliant
This gun has a muzzle velocity rating (FPS) between 366 and 500, and is compliant for export to Canada.
Free ShippingNo Coupon Required
Free shipping within lower 48 US states, no coupon code needed!


  • G&P billet style aluminum alloy upper and lower receivers
  • 14.5" MRE style keymod handguard with full length top rail accepts all popular keymod accessories and allows for integration of a wide variety of optics
  • Integrated Polarstar JACK HPA engine with custom built gearbox shell
  • Receiver integrated adjustable regulator allows for easy installation of a 13 cubic inch HPA tank
  • Custom designed stock and adapter fit over 14ci tanks with the same functionality of the traditional adjustable stock
  • Ambidextrous magazine release
  • Front and rear flip up sights
  • Eliminates the need for bulky regulators or easily tangled HPA lines

FPS Range: 380-440

Color: Black / Tan

G&P, a leader in the AEG market and PolarStar, the leader in the HPA market have joined forces to bring a new type of HPA powered Airsoft gun to the market. The R3, the result of their collaboration, makes HPA easy to use. Gone are the massive external tanks and long, awkward hoses. The R3 offers a complete, all in one, integrated HPA solution. G&P and worked directly with Polarstar to develop the R3s gearbox shell, designing it for use with the Polarstar JACK HPA system. Inside the receiver of the gun sits the JACK unit, as well as the adjustable regulator. To supply air, only simply screws a 13ci tank into the rear of the receiver, adjusts the regulator, installs the stock and the gun is ready to use. Whether you are an HPA veteran or a new comer to the work of HPA Airsoft guns, the R3 provides all the performance of the Polarstar experience, paired with the convenience and aesthetics of a G&P AEG.

Length: 800mm - 880mm, Adjustable
Weight: 3360g
Inner Barrel: 338mm
Magazine Capacity: 130rd Golfball Textured Polymer Mid-Cap. Works with Tokyo Marui, Matrix, G&P and other compatible M4 / M16 Series Airsoft AEG Magazines
Muzzle Velocity: 380 FPS variable with PSI adjustments
Thread Direction: 14mm positive
Gearbox: Polarstar JACK HPA engine
Estimated Shots: 600-900 shots per tank (depending on settings)
Fire Modes: Full/Semi-Auto, Safety
Battery: 7.4v 380mAh, connected via JST plug
Hopup: Yes, Adjustable
Package Includes: Rifle, Vertical Grip, Stock, tank adapter

Manufacturer: G&P

About G&P

G&P is among the oldest Military-simulation and training Airsoft manufacturers in the world. Started as a top combat light provider for law enforcement and military agencies around the world, G&P branched into Airsoft manufacturing with the same belief to never sacrifice quality for lower price. Their motto is visible on every G&P product. Every G&P AEG rifle is hand assembled and individually fine-tuned by top technicians in the industry to match G&P's unparalleled quality and reputation. G&P utilizes CNC precision machining and real-steel finish/coating processes on many of their products.

About PolarStar

PolarStar Precision Airsoft was formed in January 2009 to fill a need for high quality, precision manufactured airsoft components designed for performance and longevity.The 2011 release of the patented Fusion Engine HPA system marked a change in direction for PolarStar. The focus shifted from developing upgrade components within the constraints of existing systems to developing innovative HPA systems and accessories which replace the aging AEG technology.PolarStar Airsoft is a division of PolarStar Engineering & Machine (PSE&M), a unique blend of tenured American toolmakers and a full service CAE/CAD/CAM (Computer Aided Engineering, Design, and Manufacturing), special crafts machine shop keeping alive our proud manufacturing heritage of Made in the USA. Founded in 1997, PSE&M began by servicing the automotive racing industry through the design and producing systems and components from art to part. Operating under the auspices of the Delaware Association of Professional Engineers, we retain a Professional Engineer (P.E.) on staff to ensure and certify all design and engineering standards are met. In addition to our own product line, PolarStar also offers engineering and manufacturing services tailored to the airsoft industry.

2 Customer Reviews

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by Ryan S. on 04/13/2021
"So I’ve owned this gun for 2 years now and it’s still going strong. The accuracy, without upgrades, is superb. The only changes I’ve made since buying it have been to the trigger and hopup nub. I broke my stock trigger, so I replaced it with a Retro Arms J-Type (with minor filing needed) and it’s continued to work flawlessly. I replaced my nub with a Maple leaf 70 degree in the stock G&P hopup unit. I’ve only taken the Jack apart once to clean it, it’s a fantastic little system. I usually get a full outdoor game (about 20-30 minutes ea.) out of a tank fill as long as I’m choosing my shots wisely. Obviously how you play will determine how long your tank lasts. I get about 350 shots out of a tank at my current PSI setting. Externally this gun is absolutely beautiful. I get questions about it all the time. Your biggest decision (after purchase) will be what optic to throw on it, because it doesn’t need ANY internal upgrades out of the box. I highly recommend it.
by Bret S. on 02/03/2019
"Amazing Gun but the only problems I have with it is that the tank is so small and runs out very fast and the threads on the tank end up stripping to where you have to screw the tank on more and more every time you take it off and put it back on and since there’s a little plastic piece you stick on the tank to put the stock on can’t be moved that much so when the tank turns the stock turns with it in the long run I would get more than one tank and more than one of those Rail adapters if what I’m saying doesn’t make sense add me on Instagram @_lil_beamer_boy_ and dm me and I’ll send you a video of what I mean and I’ll answer any other questions you have about this gun since there’s not really any videos on it

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