Designed to be put on the charging handle to assist and make it more comfortable.
Due to the smaller diameter, compatible with the following:
➤PP-19-01/ ZP-19-01 / TK-PDW-9MM / ZK-PDW-9MM / LPPK-20 / LKR-9
➤AS VAL / MRK VAL / LGM VAL / VSS / SR-3 / SR-3M，