

Kotaku consider the M6D pistol one of the best video game handguns, noting that "there’s this split second of lag between firing and hitting that gives it a satisfying crunch that hitscan weapons in other games can’t replicate". Luke McKinney described the M6D as the "upgrade to Dirty Harry’s gun plus half a millennium of polishing", and that the pistol's "overwhelmingly effective" utility increases even further when dual-wielded with a plasma pistol. Natalie Clayton of PC Gamer called the pistol "practically legendary", but criticized it for "throwing weapon balance out the window, especially on PC", due to its "deadly-accurate headshots".

As "the most-feared weapon" in Combat Evolved as well as "the defining element of Halo LAN parties", the M6D placed ninety second place on IGN's Top 100 Video Game Weapons list. Seth Macy of IGN called the M6D Pistol the greatest weapon in Halo history, stating that it was most famous for its "three-shot kills", which would kill an enemy with three shots to the head even when shielded. A February 2016 update to Halo 5 added in a recreation of the original "Halo: CE Pistol". In Halo 5, the pistol was again made more similar to the original incarnation in Halo: Combat Evolved. In Halo 3, the pistol was changed from fast to slow-firing, but made more powerful to compensate. This was described as necessary by Chris King, the lead sandbox designer of Halo 5: Guardians, due to the ability to dual wield pistols, as if two of the original pistols could be wielded together, they would be "total madness". In Halo 2, the pistol was replaced by the M6C, which had decreased power and lacked scope functionality. Jones stated that he would "take the credit and blame for the pistol in Halo", calling the tweak due to his attention to smaller details. This was later confirmed in an IGN interview, with Jones stating that the pistol's balance "wasn't where we wanted it to be" shortly before release, and while changing the game's data was not feasible, he added code to "change a single number on the pistol" when each game map was loaded. The M6D Pistol's unusually high power was rumored to have been caused by a last-minute change in the game's code by Bungie co-founder Jason Jones that secretly increased the weapon's damage range. In Halo: Combat Evolved, Master Chief first obtains the M6D Pistol from Captain Keyes right before he crashes the Pillar of Autumn starship into the megastructure known as Installation 04. 50 Beowulf.) The M6D in particular is an "up-sized" version created for use by SPARTANs, as well as an officer's model.

It is equipped with a 2x scope, is recoil-operated and magazine-fed, and utilizes 12.7×40mm rounds(which is the same diameter of. The M6D Pistol is constructed out of steel and has a hard chrome finish.
