Designed to be compatible with most M4/M16 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 characteristics of high elasticity and smoothness and guarantees top and long-lasting performance. Recommended in rifles that have metal hop up groups with poor finishing (DBOYS and A&K). Pay particular attention to the internal hole diameter of the push rod; if the tube in your cylinder head is larger, it is advisable to change it. This product is designed and manufactured entirely in Italy, by technicians who boast years of experience in repairing and modifying airsoft replicas. Length: 21.2mm Inner hole diameter: 5.40mm 100% MADE IN ITALY.
