For every witness prosecutors put on the stand to say Sean "Puffy" Combs had a gun, the defense will put on as many as 10 to say he didn't, sources familiar with strategy for the upcoming trial told The Post.

Prosecutors have hinted in court papers that they have about three witnesses who will testify that the hip-hop honcho at least brandished a gun at Club New York in Midtown last December, during a shoot-em-up that put three clubgoers in the hospital. 

But as many as 30 other witnesses from the club's crowded dance floor will testify for the defense — and counter that Combs was unarmed, according to multiple sources who spoke on condition of anonymity. 

The ratio of witnesses for and against accused shooter Jamal "Shyne" Barrow - about six for the prosecution, versus some two dozen who help the defense — is shaping up to be equally skewed. 

With so many witnesses — Assistant District Attorney Matthew Bogdanos has warned court personnel he'll be calling about 50 on the prosecution case — the trial is on track to last as long as eight weeks. 

That's longer than many murder trials — and twice as long as the trial of four cops accused of murdering Amadou Diallo took last year in Albany. 

The defense strategy — dazzle 'em with numbers — emerged as both sides in the hip-hop shooting case geared up for jury selection next week. 

All parties are scheduled to appear in court today to discuss jury-selection rules and whether the defense can have an expert perform tests on gunpowder residue collected by cops the night of the shooting. 

Tempers were already flaring yesterday, during a routine pre-trial conference — on topics including whether Bogdanos can use Barrow's pistol-packed rap lyrics against him if he takes the stand. 

Barrow lawyer Murray Richman accused Bogdanos of "histrionics," "trying to abuse me," and being "unprofessional."