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Ships within 48 hours · Estimated delivery Sep 4 - Sep 9
Full automatic / semi automatic select fire
smooth finish for seamless cycling and long-range accuracy
Wear resistance with good sound elimination
except KWA) Standard M4/M16 AEG series rifles
Lonex Compression Upgrade Set w/ POM Type Piston Head for Airsoft AEG Rifles (Model: M4A1) BATTERIES Full automatic / semi automaticFeatures Durable steel cylinders with grooves for improved heat dissipation Internal polishing reduces friction between the cylinder and cylinder head Precision CNC machined aluminum piston head and cylinder head Steel ball bearing piston head helps with smoother rotation of spring during compression Ventilation holes in the piston head greatly increase the speed the piston travels, resulting in faster cycling Size matched piston head improves air