Modify Hybrid 6.03mm Precision Inner Barrel 363mm for M4A1 New & Old Types/R.I.S./SR16, XM177E2, SIG551

The Modify Hybrid Precision Inner Barrel is 363mm long with an inner diameter of 6.03mm, suitable for M4A1 New & Old Types/ R.I.S./ SR16, XM177E2, SIG551. Made of high-grade stainless steel and aircraft aluminum alloy, the Airsoft Inner Barrel is extremely straight with high rigidity, which enables AEGs to achieve greater range and improved overall performance. Its O-Ring design reduces barrel vibration to improve accuracy.