The APS ASR112 or also known as the APS M4 Guardian 8.0 EBB gets featured in Evike.com's "The Gun Corner"... "The new 2015 models come with APS's newest Silveredge gearbox. The all new APS Silver Edge Gearbox utilizes a unique polishing technique to remove burrs and surface imperfections from the gearbox shell. This polishing leads to an incredibly smooth and even finish that will reduce friction and lower the gearbox load. These improvements lead to a more efficient gearbox that will use less power, generate less wear, and allow for the smoothest cycle possible for enhanced performance as well as greatly extending the life of your gearbox.

Features:

• Full Metal Receiver and Rail System
• Fully Upgradeable 'Silveredge' 8mm Ver2 QD Spring Gearbox
• Retractable Crane Stock
• Rhino Flip-up Rear Sight and Metal Flip-up Front Sight
• Full Metal One-piece Hopup
• QD Sling Swivel with Adapter
• Integrated Mock Silencer

Specifications:

• Length: 690mm - 770mm, Adjustable
• Weight: 2750g
• Inner Barrel: ~285mm
• Magazine Capacity: 300rd Hi-Capacity
• Muzzle Velocity: ~380 FPS (Measured with 0.20g BBs)
• Gearbox: Ver 2 Full Metal Blowback, Fully Upgradeable
• Motor: Long Type
• Fire Modes: Semi/Full-Auto, Safety
• Package Includes: Gun, Magazine, Manual
• Battery: 9.6v Small Butterfly Type recommended (8.4v Battery and Wall Charger included)
• Hopup: Yes, Adjustable"