Delivery before X-MAS only for orders received by December 17, 2025.
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View larger CNC Steel Cylinder for AEG by ASG ULTIMATE in black.
Designed for inner barrels lenght of 201–250 mm.
Precision CNC-machined seamless steel cylinder.
Engineered for optimal air compression.
Isonite surface treatment for corrosion resistance and reduced friction.
External grooves enhance cooling during high-performance use.
: Ultimate
ULTIM077
CNC Aluminum Cylinder Head V2 by ASG ULTIMATE in blue finish. Precision-machined cylinder head made from aluminum with double sealing. Trumpet-shaped nozzle base for optimal airflow into the barrel. Cushioned impact surface to absorb piston shocks and protect the gearbox.
: Ultimate
ULTIM091
CNC Gear Set by ASG ULTIMATE with 13.5:1 gear ratio. Designed for high-speed AEG upgrade builds. Precision CNC-machined from steel for maximum strength and accuracy. Perfectly shaped gear teeth. Optimized hardness and smooth power transfer. Complete 3-gear set (bevel, spur and sector gear). 3 mm axle shafts.
: Ultimate
ULTIM094
Upgrade tappet plate V2 by ASG ULTIMATE in blue. Made from heat-resistant reinforced polymer. Compatible with AEG V2 gearboxes in M4, M16, MK18, HK416 and others. Excellent sliding properties for reliable feeding. Return spring not included.
The ULTIMATE CNC Cylinder is built for ideal air compression in AEG setups. It's made from seamless drawn 45C steel with a hardness rating of 20–25 HRC and treated with isonite oxidation for low friction and corrosion resistance. Thanks to precise CNC machining, the cylinder features a smooth inner bore and external grooves for improved heat dissipation.
ASG manufactures various cylinder types with specific hole shapes and positions depending on the inner barrel length. This ensures maximum air efficiency and optimized performance for each configuration. The cylinder has been tested for durability under high-stress use with a variety of springs. When choosing a cylinder, barrel length is key, but for accurate Volume Ratio, it's also important to consider BB weight and piston mass to avoid Joule Creep.
| Type | Inner Barrel Length | Hole Design |
|---|---|---|
| B (1/2 Hole) | 201–250 mm | ASG logo outline |
| C (3/4 Hole) | 251–300 mm | ASG logo outline |
| D (4/5 Hole) | 301–400 mm | ASG logo outline |
| E (Tip Hole) | 401–451 mm | 1/2 ASG logo outline |
| 0 (Closed) | 451 mm and above | No hole |
| A (MP5K/PDW) | 101–201 mm | Narrow longitudinal slot |
| LMG / CA25 | 451 mm and above (extended gearbox V2.5 / PSG-1 / L85) | No hole |
| Color | Black |
| Inner barrel length (mm) | 250 (mm) |
| Body/receiver material | Metal |