Upgrade your AEG with this tight bore inner barrel designed for M4A1, SR16, and SG551+ style airsoft rifles, and other AEGS with a similar inner barrel length. The 6.03mm inner diameter prevents the BB from moving around excessively within the barrel, while providing improved range and accuracy. Constructed fully from stainless steel, this inner barrel is ready to withstand the hardships of airsoft warfare, while remaining lightweight.

Features:

• Compatible with Outer Barrel Diameter 8.6mm – 9.2mm
• Precision 6.03mm Inner Diameter
• Internally Polished w/ Precision Crown
• Provides Improved Range and Accuracy
• Keeps BB Stable