Heavily modded AEG

For the sake of avoiding confusion, is your quoted 335fps based on using 0.2g BBs seeing that the bottle in the picture indicates 0.25g, in which case 335fps on the latter weight would not only be too hot to use on a site but also a section 5 firearm?

Ht-airsoft 4

Posted February 18, 2024

No that is 335fps using 0.25g BBs

In that case, you'd need to swap the spring out or otherwise modify it to bring that figure down to ~300.

 

I'm not being dramatic, this is illegal as a full-auto airsoft gun.

 

https://www.patrolbase.co.uk/airsoft-buying-guides/buying-guide-aeg-springs-what-spring-for-what-fps

So you've spent a chonky load of moneys on a gun unusable on UK sites. At least that explains why its for sale......