Zeta M91/30 not shooting straight

[Mr. Spank]

I got one of the very first M91/30 Sniper rifles that airsoftpanda got.

I only had one opportunity to field it since (my main impressions are of later periods).

When I did fire it, the BB would make a sudden 90 degree right turn at around 100' down range.

Taking it apart to work on it is a complicated mess. So I'm hoping to do it right the first time. So I'm hoping someone here can help me walk through correcting this issue here.

I also read in passing that the latest batch of rifles fix something involving a loose barrel issue of older rifles. It seems to me like maybe the hop got twisted, so the BB has a backspin at the wrong angle. All due to a loose barrel.

This architecture seems foreign and confusing to me. Please help.

[spets]

Mine somewhat did that as well. I can't shoot it anymore as I broke the cylinder head. I believe a barrel spacer should help that problem.

[Mr. Spank]

This barrel spacer, is that a part you can request from Z-L like when VFC first released their AKS74U which was somewhat incomplete?

I hope its something that simple!

Or is this something that has to be manufactured by the owner?

[spets]

If you look down the barrel (when the gun is not loaded) You will see the inner barrel moves around a bit. Just stick something such as paper, foil etc.... around the inner barrel to prevent it from moving. it may also be your hopup. Perhaps a quick spray of silicone oil will help.