I would be tempted to write a return letter to the OSBI that might go something like this:
Dear Special Agent Rosser,
Please note that within the United States currently the most popular police sidearm carried by law enforcement officers is the .40-caliber Glock pistol, in either it's G22 or G23 model configuration.
Since approximately 65% of the LEO “pistol market” is dominated by .40-caliber Glock handguns, may I suggest that you send a similar letter to ALL law enforcement personnel in Oklahoma requesting that they voluntarily bring in their .40-caliber Glocks for similar ballistic testing.
Best Regards,
Towed_ Jumper
hehehehe....
L