ZCI 6.02mm Stainless Steel Precision Tight Bore AEG Inner Barrel (Length: 550mm)

"Perfect fit on my Golden Eagle block 3 with hybrid hopup unit. And ended right at the end of the 13.7 outerbarrel. Inner barrel used was the 363mm.

"I've never had any issues with these barrels. I paired mine with a maple leaf macaroon 70d and maple leaf omega nub. The quality of these barrels is amazing to say the least. Perfect budget upgrade. Love these barrels.

"I replaced the stock brass 6.03mm inner barrel for this one and saw groupings were tighter with this barrel, well worth the price.

"Great budget upgrade barrel that increases your FPS and range. I have this in both my guns and it performs perfect without spanking your wallet.

"I have no idea why this barrel is so cheap relative to other brands, it performs far beyond expectation. With a new bucking I saw a 30 fps increase over older brass stock barrel. It also comes with a groove near the front of the barrel with a little o-ring slipped in to fit tightly inside certain outer barrels and prevent vibration shot-to-shot.

Would and will recommend to others.

"tested up to 50 yards and shoots pretty accurately. range has definitely improved, used in a G&G CM16 Raider-L. Hopefully fps hasn't gone too high to make it illegal. Price to performance is amazing. Will run these in all my cheap guns. Steel is quality and didn't feel like it will bend at all. Definitely no feeding issues, get it!

"Using in my JG SR25 build with a ProWin Hopup Chamber, a Modify Flat Bucking and a Airtech Studios Rhop Arm for a completed RHop Assembly.

With this barrel RHopped I can hit shots accurately at range with a consistent accurate flight path. I can hit targets out to around 225feet with this setup and maybe further.

I'd highly recommend for any precision build for added accuracy at range.

"Probably the best inner barrel you can get, full stop. Polish it up a little bit and it'll keep up with barrels 4 times the price.

"It was a snug fit in my JG RPK. 550mm is about as much as you want to go with the RPK barrel. I definitely noticed the accuracy and consistency improvement. And for the price for such a long barrel I cannot complain.

"So far amazing accuracy within 30-40 yards. Have t tried I. Game play yet will update review after.

"good barrel for the price, design is optimal for rhop

"Works well as a budget tightbore option. If you want to upgrade your barrel, don't bother with the other more expensive brands, just buy one of these. Not really a game changer (like a flat hop is) but definitely boosts FPS and is better made than most stock barrels.

"Not the greatest. I got this when I didn’t know any better a couple years ago and stuck it in my m14. Had worse accuracy than the stock barrel. Now that I’ve been a tech, I know better that you can’t go with a bore smaller than 6.03mm (like 6.02mm or 6.01mm) for a barrel over 300mm. Only get a 6.02mm or 6.01mm if your inner barrel is shorter than 300mm. Regardless, these barrels aren’t great even at shorter lengths. There are better barrels for only a little more cash.