TNT Standard Airsoft Inner Barrel Bore-scope

A quick look inside a TNT. Unique design. 6.01mm on the chamber end and 6.8mm on the exit end. The last 2 inches of the barrel is widened with straight grooves.
Barrel is a mix of copper and tin with an electro plated service. If you look closely enough you can see patches where the plating is coming off.

[@xtairsoft]

The TNT is 8 months old, decent usage and was cleaned inside. The wider bore end resulted in a 10% drop in fps which I kinda expected when compared with a 6.01mm inner barrel but a decent enough BB flight.

[@SiliconeSword]

Interesting the plating is coming off. Action Army barrels seems to have a really thick plating for what they are, but they're a bit wavy.
Also interesting this is a bronze and not brass, I bet that drives up the manufacturing costs

[@xtairsoft]

Does seem a little strange, bronze more expensive than brass, brass more expensive than stainless steel. Looks like the barrel is made from a mold, nothing wrong with that. Maybe you get better result with bronze from a mold. I had a peek inside an electroplated Madbull I think (roughly same age) and saw similar.
The website claims 6.03mm chamber end and 6.35mm crown end but I measure much differently. It's the same thing we chatting about a while back, how difficult it was for manufacturers to mass produce inner barrels to those precise measurements.

[@jhqtech]

I always hated tnt

[@xtairsoft]

This was kindly lent to me by a customer. I did get a few shots off and performance was decent out to 45 meters. That's as long as my range goes to. More video's on it coming in a few days hopefully..