The 
LCT PK-297 13.5 Inch Keymod Rail
 is a lightweight, durable aluminum handguard designed specifically for a wide range of LCT AK series airsoft rifles to allow for mounting accessories. 
 
Specifications
According to LCT Airsoft and various retailers, the specifications for the LCT PK-297 13.5 Inch Keymod Rail are as follows: 
Material: Constructed from a combination of CNC-machined aluminum alloy #5052 and #6061.
Weight: Approximately 575g (1.7 lbs).
Length: 13.5 inches (approx. 34.3 cm).
Compatibility: Designed for a wide range of LCT AK series AEGs (except TX-Baby and AKS74U models). Specific compatible models include LCK-74MN, LCKM, RPK, etc..
Attachment System: KeyMod slots on three sides (3, 6, and 9 o'clock positions) for direct accessory mounting, with Picatinny rail sections included for 20mm accessories.
Package Includes: The rail system comes complete with barrel mounts, an aluminum alloy gas tube, and all necessary fitting screws and hex keys.