Airsoft GI Uncut has a quick video of the Knight's Armament M4 CQB URX 3.1 AEG done by GI Michael... "The Knight's Armament URX 3.1 OEM'd by G&P is another edition of performance rifles from ZShot. Externally, the upper and lower receiver are made out of an aluminum alloy for increased durability without increasing the overall weight. Towards the front of the upper receiver is a licensed URX 3.1 rail. The Knight's Armament URX 3.1 Rail System is a freefloat system that allows for the installation of tactical accessories such as lights and optics. The modular design of this rail system keeps the weight down while allowing you to have rails where you need them.

Five QD Sling Swivel Mounts are present on this rail. Two are located near the receiver, and three are located near the front, which gives you multiple options for sling application. This RIS system is features fully licensed trademarks from Knight's Armament Company, and is probably one of the most realistic pieces of kit you can find. The two piece design allows you to drop out the lower rail in order to accommodate barrel mounted accessories such as a grenade launcher or Master Key shotgun. This rail system is compatible with most URX 3.1 accessories. Internally, G&P is known to produce quality airsoft guns. With reinforced steel gears, polycarbonate piston, and ported piston head for durability and performance. Overall, a well built airsoft gun with lightweight external setup out of the box.

Specifications:

• Manufacturer: ZShot
• Model: KAC URX 3.1
• Muzzle Velocity: 370-390 FPS
• Magazine Capacity: 130rds
• Package Includes: Gun, Magazine

Features:

• Licensed Trademarks
• Aluminum Alloy Receivers
• OEM'd by G&P
• Lightweight / Compact Design"