winning the pistol round is essential for securing that victory so why not add a game mode to warm yourself up for the pistol round?

Length:
not too lengthy but maybe 4 rounds just like spike rush

How it works:
each team gets 800 credits when they start the game as usual and when the round ends, you reset back to 800 credits ensuring you only train for pistol rounds.

What I personally would add:
to switch sides on round 3 no matter the win or loss streak ensuring you get warmed up for both sides equally (2 rounds attackers 2 rounds defenders)