CSR (Compact Sectional Rods) was originally conceived to be a short and compact sectional rods for dislodging stuck cases in the chamber when mortaring the AR15/M16 fails.  The USGI cleaning rods are almost perfect for the job, except they're quite long.  They wanted shorter rods that can be carried in packs more easily.  CSR can also be used as a cleaning rod with the provided brass jag, it is not its primary function, however.

CSR  is a kit consists of precision machined 17-4 stainless steel, short (4.8" max length) rods with bead blasted matte finish, also included are a machined brass jag, and 17-4 stainless steel plug/ram.  CSR is based on the old M16 cleaning rods, they've done away with the folding T handle to reduce bulk when stowed.

The jag is machined in brass, while the stainless steel plug is 17-4 SS (same material as the rods).   The stainless plug should be threaded to the end of the rod when CSR is used to dislodge a stuck casing.

• 10.5 - 12.5: 1 handle, 1 standard length rod, 2 short rods, 1 ram plug and 1 jag.
• 14.5 - 16: 1 handle, 3 standard length rods, 1 short rods, 1 ram plug and 1 jag.
• 18 - 20: 1 handle, 3 standard length rods, 2 short rods, 1 ram plug and 1 jag.

Please NOTE: CSR was designed primarily as a compact rammer for stuck casings, not as a cleaning kit, though it does come with a jag for attaching a cleaning patch.  CSR is incompatible with USGI cleaning rods attachments (chamber brush, jag, and bore brush), as it is threaded for 8-32.