Why use the DM56 in MW3?
There’s a decrease to ADS speed, but it’s negligible at the end of the day.
Underbarrel: XRK Edge BW-4 Handstop
More speed increases await us with the XRK Edge BW-4 Handstop.

We prefer the Slate Reflector for most weapons that have shoddy as-is ironsights, and it works well here.
Best DM56 class setup: Secondary weapon
WSP Stinger.
The DM56 is no exception to this rule.

Best DM56 alternatives in Modern Warfare 3
MTZ Interceptor or Crossbow.
TheMTZ Interceptoris currently our preferred Marksman Rifle in MW3 and will outperform the DM56 in the accuracy department.
Meanwhile, if you want to be an absolute wildcard, you could always give theCrossbowa go.
Technically it still counts as a Marksman Rifle, even if it shoots bolts instead of bullets!
That finishes our deep dive into the best DM56 loadout.