It is a 551, I have edited the title

Although the box has very minor scrapes you can still smell that new gun smell when you open it up. The gun is new with no scrapes or markings and only fired to ensure that it works. We also decided to throw in a FREE Vertical Foregrip! This AEG usually runs for $265.00 (not including verticle foregrip). This gun is also under the seven day money back guarantee.




Includes: Original Box, New Gun, Clip, Instruction Manual, Manual/ Feature DVD, 8.4v 1200mAh Stick Battery, Charger, 1000 0.2 bb's, Vertical Foregrip, and an Orange Barrel Cover.

Motor: ICS Turbo 3000 Medium Type
Body: Steel / Aluminum
Rate of Fire: Depends on battery & spring installed
Muzzle Velocity: 395 FPS, 120 m/s
Dimension: 835mm x 578mm
Inner Barrel Length: 370mm
Weight: 2800g (Without Battery)
Inner Barrel Diameter: 6.08mm
Magazine Weight: 200g
Magazine Capacity: 470 rounds
Gearbox: M120
Gears: ICS Steel Gear Set
Bushing: ICS Steel Bushing

Features:
-Industrial Grade Hard ABS / Polymer Folding Stock for Maximum durability.
-Fully Licensed by SIG Arms.
-New Generation Design for Easy Field Stripping.
-Integrated Rail Interface System for tactical optic and illumination attachments.
-Realistic Marking on receiver.
-Adjustable Front & Rear Sight for day & night operation with realistic marking.
-Folding Trigger Guard (for cold weathers and thick gloves)
-Working Bolt Carrier. (Bolt stays back until release is pressed, for easy hopup adjustment and enhanced realism.)
-Connectible Clear Magazine for visible "Rounds-left-status".
-Folding Stock