The LCT plastic lower handguard in black (BK) is an airsoft accessory for LCT AK Series AEGs and GBB rifles, primarily the PK-145 or similar models. 
 
Product Details and Compatibility
The handguard is designed as a direct replacement for various LCT AK models, offering a tough, yet lightweight, plastic build. 
Model Name: The most common product code for the standard black plastic lower handguard is the LCT PK-145. Other variations, such as the tactical AK-9 style (PK299) or the slimline (LC001), also exist.
Material: It is constructed from durable polymer/plastic, sometimes with steel components like the mock heat shield depending on the exact model.
Compatibility: The handguard is designed to fit a wide range of LCT AK series electric airsoft guns (AEGs) and gas blowback (GBB) rifles without modification.
Compatible Models include: LCK-74MN, LCK-74M, LCKS74M, LCK-104, LCK-105, LCK-74, LCKS-74, LCKM, AIMS, PP-19-01, and more.
Note: For non-LCT brand AK replicas (e.g., GHK AK V2 series), some adjustment may be required for correct installation.