The SOPMOD Block 3 or more commonly known URG-I (Upper Receiver Group Improved) is a rifle model currently used by several US special forces units.
The URG-I is designed to be an upgrade over the venerable MK18 and SOPMOD Block 2 versions of the M4 and boasts improvements over its predecessors.
Upgrades such as a slimline M-LOK handguard, an improved bolt carrier assembly, and an oversized cocking handle are some of the easy to point out differences between the URG-I and other M4s.


Manufacturer: Vega Force Company
Model: M4 URGI CQB SOPMOD BLOCK 3
Material: Full metal
Weight: 2700g
Length: 675 / 755mm
Inner barrel: 275mm
Magazine: 30 rounds
Shell: completely in metal with silkscreened logos
Rear sight: front and rear removable and foldable
URG-I M-Lok compatible front handguard
Output speed: 100m / s
Mode of action: gas
Shooting modes: single / burst
Football: Adjustable
Latest generation valve magazine (1x included)

Technical features:
Blowback with recoil simulation
Removable like the original
Latest generation valves
Inner barrel: precision
GuideHop adjustable hop-up