UN Company sent in comparison between these two Western Arms M4 models for you to make a reference... "Recently there is newly released Airsoft Guns from the Western Arms Brand. With the following will be the fine designed guns from this company which is famous for selling Hand Guns and Pistols. After deep consideration I have chosen two of them for introduction to you all readers. And I wanted to compare this two for your reference.

WA M4 Delta CQBR Versus WA M4A1 RIS

• Magazine Capacity: 50Rounds (6mm)
• Length: 660-742mm: 767-849mm
• System: MAGNA Gas Blow Back
• Fire Mode: Semi/Full Auto
• Hop Up: Adjustable
• Muzzle Velocity: 250-280 FPS (0.2g BB/134a)/330-350 FPS (0.2g BB/Top Gas)
• Package Includes: Gun, Magazine, Manual & Box
• Weight:  2370g: 2830g

Besides, they share some common features:

• Glass-Fiber Reinforced Polymer Receiver
• Authentic Appearance Bolt Carrier/Bolt (Loading Nozzle)
• Realistic Field Stripping
• Metal Bolt Carrier
• Aluminium Buffer Tube
• Functional Forward Assist Button
• Empty-Firing Mode, does not hold bolt open with empty magazine

The sale price for them are US$ 426 and US$ 585 correspondingly. Both of them are tested by the manufacturer and made sure of high quality for them to be launched. And there are more from the WA Company Series. They also are on posted on our web site (http://www.uncompany.com/) for you to visit and are available for you to place order. "