Prometheus 6.03mm EG Inner Barrel for AEG - 229mm Sniper Pistons The mouthpiece features a protective

The mouthpiece features a protective dirt/dust cap to keep it clean and fluid is released with a push/pull cap design

And at long last

100 Decibel Sound – Whistle can be heard up to 1 mile away

It is mounted on lower rail handguard by 4 screws and receiver by 1 screw

with a beautiful matt finish

Prometheus 6.03mm EG Inner Barrel for AEG - 229mm Sniper Pistons The mouthpiece features a protectiveInner bore width of 6. 03mm with a 0. 01mm tolerance. MP5A4, A5, SD5, SD6, Spetsnaz. Solid BB stability and accuracy, made with enhanced stainless steel (SUS). Inner barrel bore width of 6. 03mm with a tolerance of 0. 01mm, made of stainless steel for superior strength necessary to maintain accuracy without the need for special coatings. The barrel is arguably the heart of any airsoft gun and determines various performance factors such as velocity