This Vism BlastAR Handguard was never designed for DPMS rifles. It fits onto ARs with carbine length handguards and gas tube. Mounts onto the barrel using the front handguard cap and the Delta ring. The handguard wraps around the front sight post and extends forward of the front sight post for more handguard area for your support hand and accessories.
Yes, it should be compatible.
Yes, they would be compatible.
Yes, this should fit to models with the delta ring assembly and the carbine length gas system.
Yes as long as it has a front gas tube sight.
The overall length is 14.25".
Yes if original Saint, no if Victor. This is a drop in handguard, so your barrel must have a delta ring and handguard retainer ( Saint does, Saint Victor does not).
The overall length of this handguard is 14.25".
This handguard requires a delta ring assembly on a carbine length gas system.
No, it will not.