I was looking up the history of M9A1 procurement (for some personal research) and came across this archive document:
https://www.neco.navy.mil/synopsis/detail.aspx?id=121395
“This is a notice of intent to award a sole source, firm fixed price contract to Beretta USA Corp., 17601 Beretta Drive, Accokeek, MD 20607 for the following items: 3,480 M9A1 Pistols; 6,960 PVD Nickel plated improved magazines; and, 3,480 M9A1 Pistol Holster systems. Classification Code is 10 – Weapons. NAICS Code is 332995.”
On 17 May 2006, this modification appeared:
https://www.neco.navy.mil/synopsis/detail.aspx?id=136938
“The U.S. Marine Corps Systems Command (MARCORSYSCOM), Infantry Weapons Systems, Contract Group, Quantico, VA, intends to award a supplemental agreement to commercial item contract number M67854-05-C-1064 (P00002) that was awarded on a sole source basis under FAR Part 6.302-1 to Beretta USA Corp, 17601 Beretta Drive, Accokeek, MD 20607-9566. The purpose of this supplemental agreement is to increase CLIN 0001, 3,890 Beretta M9A1 9MM Pistols (includes 2 each 15 round magazines), CLIN 0002, 7,779 Beretta 9MM PVD 15 round magazines (C86021SR), and CLIN 0003 3,890 Beretta M9A1 Holster System, Coyote Tan.”
Is the modification increasing the basic quantity from 3,490 pistols to 3,890 or adding an additional 3,890 pistols to the overall order?