Proline M4 SD 7" Quad-Rail Airsoft AEG w/ Crane Stock

Specifications
Operation: Electric Automatic
Build: Metal Upper/Lower Receiver, Buffer Tube, Outer Barrel / Nylon Fiber Stock, Motor Grip
Firing Modes: Semi-Automatic, Full Automatic (w /Safety)
Muzzle Velocity: 370 - 395 FPS (w/ 0.20 BBs)
Gearbox: Version 2 (Metal)
Battery: 7.4V or 11.1V LiPo Nunchuck Recommended (Battery and Charger Not Included)
Magazine Capacity: 120 Rounds
Hop-Up: Yes, Adjustable (Rotary Style)
Inner Barrel Diameter: 6.03mm (Tight bore)
Inner Barrel Length: 343mm
Length: 28.5 - 32.5 Inches (Retracted / Extended)
Color: Tan
 
Features
Built-in Lancer Fast Trigger w/ MOSFET to regulate electric flow and protect trigger contacts
Full metal upper/lower receivers, one-piece outer barrel, CNC buffer tube
Quick-change spring system for rapidly adjusting muzzle velocity
Low-resistance wiring prevents potential damage from the battery
Enhanced trigger guard and motor pistol grip w/ positive texturing for improved handling
Ball bearing spring guide w/stands higher stress from gearbox cycle
Polished 6.03 mm tight bore inner barrel for improved air seal and accuracy
Full metal Version 2 rear-wired gearbox provides easy battery access and ample space
20mm top optic rail mounts scopes, sights, and magnifiers
One-piece outer barrel provides stability and zero wobble
Upgraded gearbox w/ 18:1 steel gear set and high-speed motor
LiPo-ready Proline AEG shoots at 22 RPS w/ 11.1V LiPo battery (battery/charger not included)
Lancer Tactical 120rd midcap magazine and 1,000rd bag of 0.20g premium BBs included
Improved crane stock w/ rubberized buttpad w/ double-sided sling mount