Designed to be compatible with most M4 replicas on the market today. This product ensures an excellent seal during the air compression phase, so the blows are more uniform and precise. The material used has high mechanical resistance characteristics and guarantees top performance and long life. This product is designed and manufactured entirely in Italy, by technicians who boast years of experience in repairing and modifying airsoft replicas. Length: 21.20 mm Inner hole diameter: 5.43mm 100% MADE IN ITALY.
