The 
LCT LC004 Wide Handguard(GR)
 is a polymer handguard in green (often referred to as Olive Drab or OD Green) designed as an accessory and replacement part for the LCT LC-3 series AEG airsoft rifles. It offers a wider profile compared to the standard slim handguard and includes a steel mount for an optional bipod attachment. 
 
Specifications
According to various online airsoft retailers and the manufacturer's website, here are the general specifications for the 
LCT LC004 Wide Handguard(GR)
: 
Brand: LCT Airsoft
Material: Durable polymer construction with an aluminum heat shield
Color: Green (Olive Drab/GR)
Length: Approximately 14 inches (355mm)
Weight: Approximately 14 oz (400g)
Compatibility: Specifically designed for LCT LC-3 AEG Rifles. The manufacturer explicitly states that compatibility with non-LCT products cannot be guaranteed. One user review mentioned it could be fitted to a WE G3 GBB with some modification.