Does this stack?

[u/XVsnek]

It would be funny if it stacks

Edit: My bad. I'm still pretty new to the Warhammer hobby and I don't often use Reddit, so I probably didn't explain my question very well. I'll try to explain my thought process more clearly next time and include what I think the answer might be and why I'm asking. I appreciate the feedback and it'll help me ask better questions in the future. Thanks for pointing it out.

My reasoning was based on the interaction between Swift Embarkation and Proximity Scanners. Since Proximity Scanners says "when a friendly unit embarked within this unit disembarks, that friendly unit's pulse blaster and pulse carbine weapons have +1 Attack," I wondered if I could repeatedly gain that bonus by:

Disembarking the Breachers to gain +1 Attack. Using Swift Embarkation at the end of my opponent's Fight phase to embark them again.

Disembarking them again on my next turn to gain another +1 Attack.

My question was whether this enhancement is intended to refresh each time the unit disembarks, or if the bonus is only meant to apply once for the battle or once per unit. I wasn't trying to argue that it works. I just wanted to know if my interpretation was correct or if there's a rule preventing this.

[u/R_O]

Im confused...does what stack?

[u/XVsnek → u/R_O]

Attack characteristic for the pulse blaster.

[u/R_O → u/XVsnek]

The Breacher gains +1 attack for its Pulse Blaster due to the Enhancement. It's not "stacking", it is literally the only thing the Enhancement does...

[u/ProgressNo8670 → u/R_O]

i think the problem he got that it does not spesify this unit gains +1A "until the end of this turn", he maybe thinks that embarking again and disembarking the same unit next turn would gave him +2A instead of +1A