Alpha CRB

Features Overview

Metal Alloy Receivers

Metal alloy receivers provide a strong and lightweight foundation for the AEG and are responsible for and housing the KRYTAC Nautilus Gearbox.

A2 Grip

The tried and true A2 pistol grip gives the KRYTAC Alpha models a familiar, and comfortable, feel to support consistent trigger pull and shot placement.

Bolt Catch

Pulling the charging handle back locks the bolt plate in position, allowing easy access to the KRYTAC Rotary Hop-up Unit for adjustment. Pressing the bolt lock will send the bolt plate home to protect the Hop-Up unit from dirt and debris.

Hand Guard

Constructed from hard anodized, lightweight aluminum, the ergonomic Alpha rail are contours to the hand for a comfortable support grip.

Rail Sections

Remove the locking nut from the KRYTAC Keymod rail sections to directly attach the rail section to the Alpha rail.

Adjustable Stock

A 6 position adjustable stock allows the rifle to adapt to your preferences. The large cavity in the stock provides ample space for storage and can be extended to accommodate a wide variety of battery types.

Internal Overview


An onboard MOSFET built into the Nautilus Gearbox regulates battery current to protect the trigger contacts. This system helps ensure the longevity of the gearbox while providing consistent performance with various battery types.

Padded Cylinder Head

The padded cylinder head helps soften and absorb the shock transferred to the gearbox while in use, it also provides proper angle of engagement between the piston and sector gear.

Reinforced Piston

The KRYTAC Reinforced Piston is both strong and lightweight, durable to handle the high cyclic rate of the Nautilus Gearbox and light to conserve energy.

Rotary Hop Unit

The KRYTAC Rotary Hop-Up unit is designed to optimize the range and accuracy of your AEG. The rotary adjustment wheel is precise and definitive, each click position is numbered with a tactile and audible feedback when adjusting.

Easy Spring Change

The Nautilus Gearbox features an easy spring change that does not require the full disassembly of the gearbox.

Available Models

SKUOverall LengthOuter Barrel LengthInner Barrel LengthVelocityCountry configMSRP
KTAEG-APCRB-BK01711 mm / 28" - 795 mm / 31.3"266.7 mm / 10.5"280 mm290 FPS / 88 MPS - 310 FPS / 95 MPSUS, BR$255.00View Product
KTAEG-APCRB-BK02711 mm / 28" - 795 mm / 31.3"266.7 mm / 10.5"280 mm290 FPS / 88 MPS - 310 FPS / 95 MPSEU, HKView Product
KTAEG-APCRB-BK03711 mm / 28" - 795 mm / 31.3"266.7 mm / 10.5"280 mm275 FPS / 84 MPS - 290 FPS / 88 MPSITView Product
KTAEG-APCRB-BK04711 mm / 28" - 795 mm / 31.3"266.7 mm / 10.5"280 mm275 FPS / 84 MPS - 290 FPS / 88 MPSJPView Product