Custom G&P M63A1 Squad Automatic with PolarStar Fusion Engine

When it comes to heavy support weapons in airsoft, the Custom G&P M63A1 Squad Automatic with PolarStar Fusion Engine stands as one of the most formidable and reliable choices for serious players. Built for players who demand superior firepower, unrivaled durability, and the customization power of HPA, this custom SAW bridges realism and performance to dominate any field.

Unmatched Construction & Durability

The G&P M63A1 is renowned for its heavy-duty steel and aluminum construction, giving it the strength and realism expected from a squad automatic weapon. Every detail has been carefully designed to withstand the rigors of extended gameplay. A one-piece CNC machined aluminum outer barrel ensures structural integrity while keeping tolerances tight for consistent shooting.

Complementing the metal components are polycarbonate reinforced with glass fiber parts for the motor grip, handguard, and stock. These materials strike the perfect balance between strength and weight, giving you long-term durability without unnecessary bulk. At just 4620g, this SAW is manageable for a heavy weapon, making it fieldable for extended operations.

Precision HPA Power – PolarStar Fusion Engine

What sets this custom build apart is its integration of the PolarStar V2 Gen3 Fusion Engine, one of the most advanced HPA systems in airsoft. With adjustable PSI settings, you can fine-tune your FPS between 390–440, tailoring performance for indoor CQB, outdoor MILSIM, or long-range engagements.

The Fusion Engine offers an unparalleled trigger response, consistency, and efficiency. Unlike traditional AEGs, the HPA system eliminates issues like motor heat and gearbox wear, ensuring your M63A1 delivers top-tier reliability every time you pull the trigger.

Superior Firepower & Feeding System

No support weapon is complete without high ammo capacity. The included 1200-round electric box magazine ensures you’ll have more than enough firepower to suppress and dominate opponents. Thanks to its spring-assisted feeding system, you’ll experience reliable feeding in any orientation—critical for a weapon designed to put down walls of fire.

The PolarStar engine combined with the M63A1’s robust design gives you full-auto firepower with pinpoint accuracy. Individually adjustable hop-up allows you to fine-tune your trajectory for BB weights ranging from .20g to .28g+, making this gun adaptable to multiple play styles.

Tactical Flexibility & Customization

The M63A1 is not just about brute force—it’s about versatility. A 20mm top rail on the feed cover allows for mounting red dot sights or optics for faster target acquisition. Meanwhile, the railed handguard gives you the option to attach foregrips, lights, or lasers to adapt your loadout to mission needs.

Its adjustable die-cast rear sight offers a classic option for players who prefer iron sights, while the HPA-powered performance ensures consistent accuracy even during high-volume sustained fire.

A Custom Build with Exclusive Quality

This is not an off-the-shelf replica. The Custom G&P M63A1 Squad Automatic is an exclusive build, incorporating the PolarStar Fusion Engine for players who refuse to compromise on performance. Because of the detailed custom work, please allow an additional business day for handling.

Every G&P replica is hand-assembled and fine-tuned by experienced technicians, ensuring a level of craftsmanship that meets G&P’s reputation as one of the most respected airsoft manufacturers in the industry.

Specifications at a Glance

• Length: 930mm

• Weight: 4620g

• Inner Barrel: 440mm

• Magazine Capacity: 1200rd electric box mag

• Fire Modes: Semi / Full-Auto, Safety

• FPS Range: 390–440 (variable with PSI)

• Thread Direction: 14mm Positive

• Battery: PolarStar 7.4v LiPo (JST connector, not included)

• Hopup: Adjustable

Dominate the Field

The Custom G&P M63A1 Squad Automatic with PolarStar Fusion Engine is built for players who want to control the pace of the game. Whether you’re laying down heavy suppressive fire, providing cover for your squad, or simply enjoying the raw power of HPA technology, this weapon is a force multiplier.

With battle-ready durability, cutting-edge HPA power, and massive magazine capacity, this SAW is more than just an airsoft gun—it’s a game-changer.