The CAA Airsoft MS4 Full Metal AEG Series gets featured in Evike.com's The Gun Corner... "This is the official CAA (Command Arms) Licensed M4-S1 CQB Airsoft Rifle. The receiver is made from high quality machined aluminum, each coming with an individualized serial number making this a legitimate collector's item as well as a formidable combat rifle. The polymer handguard features a triple rail setup with an interchangeable lower rail allowing the user to customize rail space to their preference.

All furniture is a high strength nylon fiber reinforced polymer. From the ergonomic pistol grip to the adjustable 6-position stock, this rifle combines the best in creature comfort and battle-ready utility. The stock also features an integrated CR123A battery compartment and QD Sling Swivel attachment points.
Internally the CAA M4 CQB uses a tried and true King Arms 7mm Bearing Ver 2 gearbox and a quality one-piece hopup. Hopup adjustment is also made easier with the integrated bolt catch function.

Features:

• Fully Licensed CAA Trademarks
• Full Metal Receiver and Barrel Assembly
• High Strength Nylon Fiber Polymer RIS Handguard, Grip, and Stock
• Adjustable Cheek Riser
• Adjustable 6-position Stock with Rubber Buttpad
• Integrated CR123A Storage Compartment in Stock (Batteries not included)
• Ergonomic Pistol Grip
• Flip-up Polymer Rear Sight
• Railed Flat Top Receiver great for Optics
• QD Sling Swivel Points on Stock and Handguard (Sling Swivel not included)
• Full Metal, Fully Upgradeable 7mm Bearing Gearbox

Speciifications:

• Length: 705mm-790mm, Adjustable
• Weight: 3075g
• Inner Barrel: ~275mm
• Magazine Capacity: 360rd Hi-Capacity CAA Mag. Works with Matrix, G&G, Tokyo Marui and other compatible M4 / M16 Series Airsoft AEG Magazines
• Muzzle Velocity: 370~400 FPS (Measured with 0.20g BBs)
• Thread Direction: 14mm Negative
• Gearbox: Ver 2 Full Metal, Fully Upgradeable
• Motor: Long Type
• Fire Modes: Semi/Full-Auto, Safety
• Package Includes: Gun, Magazine, Manual
• Battery: 9.6v 2300mAh Small Type Nun-Chuck recommended (Battery not included)"