Matrix Precision Steel 6.03mm Sniper Tight Bore Inner Barrel for WA GBB Airsoft Rifles (Length: 300mm)

"Great product, recommend it to everybody looking to replace their inner barrel.
Pros:
cheap
well made
makes gun more accurate
Cons:
none

"Perfect! This thing is perfect, I put this on my HFC M11 and i swear this thing can shoot accurately to 150ft! Perfect for Indoor airsofting and a GREAT back up for a sniper that wants a sidearm as accurate as their primary