Upgrade your AEG for maximum performance with this Tight Bore Inner Barrel from SHS. Constructed fully from brass, this inner barrel replacement can withstand a lifetime of heavy use. The 6.03mm inner diameter ensures the BB will fly straight through the barrel without bouncing around within. The universal design of this inner barrel upgrade allows it to be installed in most M4 style AEGs. Stock up on everything you need to maximize your rifles full potential and add this Tight Bore Inner Barrel from SHS to your lowdown today.