For LCK-74 / LCK-74M / LCKS-74 / LCKS-74M / LCK-74MN / STK-74 / G-03 / G-03M / ZKS-74M / LCKM / LCKM (Stainless Steel) / LCKMS / LCKM Economy / LCKMMS / AIMS / TIMS / TKMS / LTS-Keymod 13.5 / MRK-74/ M-LOK LCKM
LCK-104 / ZK-104 / LCK105 / AIM Carbine / G-04 / G-04M / MG-MS / TX-M / TK-102 / TK-104 / TK-105 / MRK-105 / M-LOK LCK104 Need to mate it with LCT parts: ZB-10M / ZB-10L handguard
For VZK-MSU / LCKMSU / LCKS-74UN / LCK-106 / TX-74UN / TX-S74UN / TK-BABY Need to mate it with LCT parts: ZB-11 L / ZB-11U handguard
For PP-19-01 / ZP-19-01 / TK-PDW-9MM / ZK-PDW-9MM / LPPK-20 Need to mate it with LCT parts: ZB-21M / ZB-21L handguard