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Krytac Alpha SDP M4 AEG Airsoft Rifle (Black/Option)

[O10C00][35179 / KTAEG-APSDP-BK01]
Also available at: CA Walk In Store
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KRYTAC, established in Southern California in 2013, is a dedicated product research and design team of the Switzerland-based firearms manufacturer KRISS Group. The primary focus of KRYTAC is to engineer premium airsoft products for recreational use. Additionally, KRYTAC also specializes in the advancement of cutting-edge professional training systems. The KRYTAC team is comprised of highly experienced firearm and airsoft professionals who have come together for one common goal, to provide premium products that evolve individuals beyond their boundaries. The KRYTAC brand name takes its inspiration from the legendary sea creature The Kraken. The Kraken was feared, and revered, for its power and dominance in the sea. No other creature could match The Kraken in strength and speed. The spirit of The Kraken lives on in KRYTAC, as their Alpha series of airsoft AEGs provides the same power that you need for land-based MilSim action.

The Alpha SDP CQB Airsoft Rifle is a compact, lightweight, full metal AEG that combines the maneuverability of a pistol with the firepower and capacity of a rifle. It has many of the same construction and technology features of the rest of the Alpha line, but with a shorter barrel so you can navigate tight indoor spaces. Based on the AR design, the Alpha SDP features a futuristic aluminum hand guard with a smooth finish for a comfortable grip. The aluminum receivers have a stamped KRYTAC logo and accept airsoft M4-style magazines. A 300-round magazine is included that color matches the black frame.

Additional features of the KRYTAC SDP M4 Carbine include an ambidextrous fire selector and a locking bolt that provides easy access to the KRYTAC rotary hop-up system. The KRYTAC rotary hop-up has 15 adjustment settings and a numbered adjustment wheel for a quick reference point to determine how much hop is needed. With this level of adjustability, you can get off good mid-range shots when you need to. The battery is stored in the buffer tube of the KRYTAC Compact Carbine stock, which was designed to provide ample room for a wide range of batteries. The 2-position stock can be adjusted for combat or storage purposes.

While the external features of the Alpha SDP are engineered for durability and ergonomics, the heart of its performance lies within the gearbox. This CQB airsoft rifle features a reinforced 8mm ball bearing gearbox with integrated MOSFET to regulate electronic signals and to protect the trigger contacts. The corners of the gearbox that surround the cylinder feature a smooth radius, as opposed to a 90-degree angle, to prevent fracture. Also, the gearbox shell features a small window on the left side where lubrication can be applied directly to the gears or piston. This window is also convenient for inspecting the angle of engagement with the gearbox fully assembled. Additional gearbox features include a modular spring guide system that will allow the spring to be changed without completely disassembling the gearbox.

The KRYTAC piston is made of a durable, lightweight polymer and features four metal teeth with the 2nd to last tooth absent. The cylinder head is padded with an enlarged rubber bumper to optimize the angle of engagement and to absorb energy from the impact of the piston assembly. The material for the gears has been specially formulated to be very strong - Rockwell test figures on the KRYTAC gears are much higher than industry norms. Turning all of the drive train components is the KRYTAC high-torque motor capable of 20,000 revolutions per minute unloaded. The Alpha SDP provides the familiarity, controls and firepower you need from a rifle and also offers the compact package for CQB. It is the ideal AEG for high-speed engagements in tight and confined spaces. It has a 60-day manufacturer's warranty and comes with front and rear iron sights.

Manufacturer: Krytac
Model: Trident SDP
Muzzle Velocity: 275-290 FPS
Magazine Capacity: 300rds
Package Includes: Gun, Magazine, Iron Sights
Warranty Length: 60 Days
Warranty Handler: Krytac (Warranty Policy)


  • Aluminum Alloy Receivers
  • 8mm Ball Bearings
  • Easy Change Spring System
  • Ambidextrous Fire Selector
  • Cylinder Head w/ Sorbothane Pad
  • Integrated MOSFET System
  • Locking Bolt and Bolt Release
  • Adjustable Locking Rotary Hop-Up

Please Note:

  • Optic, Battery and Charger are NOT included.

Manufacturer: Krytac
Muzzle Velocity: 275-290 FPS
Magazine Capacity: 300 Rounds
Fire Mode: Safe, Semi, Auto
Color: Black
Material: Metal/Polymer
Battery Pack: Not Included
Package Includes: Gun, Magazine
Stock Type: Collapsible
Cylinder Head Type: Polycarbonate w/ Sorbothane
Cylinder Type: Type 1
Piston Head Type: Polymer / Ported
Piston Type: Reinforced Polymer
Air Nozzle Type: Version 2
Tappet Plate Type: Version 2
Spring Type: M100
Spring Guide Type: Version 2 / Metal
Bushing Size: 8mm
Bushing Type: Bearings
Gear Set Type: Reinforced Standard Ratio
Switch/Wire Type: Version 2 / Low Resistance
Cut Off Lever Type: Version 2
Anti Reverse Latch Type: Version 2
Motor Type: Torque / Long Type
Hop Up Type: Locking Rotary M4 / M16
Fuse: Yes
Connector: Small Tamiya
Quick Spring Change: Yes
Primary Build Material: Metal
Gear Box: Krytac Version 2 Custom Gearbox
Spring Release: No

No reviews | Write a Review
Can i put in a stronger spring?
Without changing the motor or anything could i drop a m115 or a m120 spring and be good to go? Where i play the fps cap i doors is 400. So id like to uo the fps count a bit.

770 days ago
Chris B

(I have this same question)
Staff Answer:
You should be good with the 120. Anything past that, I would say to potentially start upgrading any coinciding internal parts.

768 days ago
1 answers
1 asked
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