Marines with the 31st MEU's Deep Recon Platoon (DRP) fires MEUSOC .
45 pistols at a firing range, 2006.
Deep Reconnaissance Platoons carry out force reconnaissance operations.
They maintain a high level of proficiency with small arms, such as the M4a1 carbine and MEUSOC pistol.
A compromised DRP may find itself having to engage the enemy at close range.
Transitionally to the sidearm in the event of a stoppage in the primary is a much-practised drill.