Bartholomew Roberts
Member
The Designated Marksman is more of a concept than a rifle. Initially, the East Coast and West Coast came up with different variants of a specialized M16 variant to serve in that role.
The trials (and there is a big PDF report on these somewhere out there on the net) showed two things:
1. The regular M16A4 was accurate enough to serve in the DMR role without additional modifications.
2. The DM was a great concept; but when it was only one guy per squad, he was often in the wrong location to be useful.
Those two ideas led to the idea that all Marine riflemen would be issued RCOs, though I don't know if they are still doing the specialized DM training for one guy per squad or not.
The SPR is a separate but similar concept used only in SOCOM and was born out of the Recce rifle idea (an M4 with just a tiny bit more long-range capability for spotters).
The trials (and there is a big PDF report on these somewhere out there on the net) showed two things:
1. The regular M16A4 was accurate enough to serve in the DMR role without additional modifications.
2. The DM was a great concept; but when it was only one guy per squad, he was often in the wrong location to be useful.
Those two ideas led to the idea that all Marine riflemen would be issued RCOs, though I don't know if they are still doing the specialized DM training for one guy per squad or not.
The SPR is a separate but similar concept used only in SOCOM and was born out of the Recce rifle idea (an M4 with just a tiny bit more long-range capability for spotters).