AirTac Customs Gen 4 Upper Receiver

The Gen 4 utilizes a reinforced nylon frame that is engineered to be 40% stronger than its predecessors. This structural improvement is paired with a blend of genuine carbon fiber and ABS polymer, creating a platform that balances lightweight handling with significantly increased impact resistance.

The Gen 4 is designed for broad compatibility with most major HPA systems, including Polarstar Fusion Engines, F2, Jack, Inferno, N7, and Pulsar. It is also optimized to work seamlessly with AirTac Customs CRBN gearboxes.

Yes, the receiver is designed to accommodate standard aftermarket hop-up chambers. It is specifically tested for compatibility with MAXX and Retro Arms hop-up units, ensuring you can maintain your preferred hop-up setup.

The dual hop-up windows allow for quick, on-the-fly adjustments without needing to disassemble the rifle or remove the upper receiver. This is particularly useful during gameplay when you need to fine-tune your trajectory based on changing wind conditions or BB weights.

Yes, the front of the receiver features CNC-machined 6061 aluminum with standard 14mm CCW (negative) threading. This ensures it will accept the vast majority of airsoft suppressors, tracers, and flash hiders on the market.

The Gen 4 upper is built with broad compatibility in mind and is designed to drop onto most standard G&G polymer or metal lowers, as well as Lancer Tactical lower receivers, with minimal to no modification required.