Griffin Armament Standard SPRM Up to $10.95 Off w/ Free Shipping — 6 models

For a Trijicon Credo 1-10 (which has a 34mm tube) mounted on an LWRC IC DI, the ideal height depends largely on your shooting style and whether you use "stock" or "heads-up" posture. The 1.50" (Standard) Height — Highly Recommended—This is our most popular recommendation for a versatile rifle like the LWRC IC DI. The 1.70" (Lower 1/3) Height—If you find yourself shooting primarily from a standing position or wearing bulky electronic hearing protection, 1.70" is an excellent alternative.

For the Standard SPRM™ Mount, the spacing between the rings is designed to accommodate the vast majority of modern variable-power optics.
Ring Spacing Dimensions:
Inner Space (between rings): Approximately 3.15 inches.
Outer Width (edge to edge of rings): Approximately 4.9 inches.
Ring Width: Each ring is roughly 0.875 inches wide.

Will it work with the Vortex Diamondback Tactical?
The answer depends on which specific model of the Diamondback Tactical you have, as the "mounting space" (the straight part of the 30mm tube between the objective bell and the adjustment turrets) varies significantly across the line.

Diamondback Tactical 6-24x50 FFP: Yes. This scope has a very generous mounting length of about 6.5 inches. It will fit the SPRM™ mount with plenty of room to slide the optic forward or backward to set your eye relief.
Diamondback Tactical 4-16x44 FFP: Yes. It has approximately 5.4 inches of mounting space, which easily clears the inner spacing of the SPRM™.
Diamondback Tactical 4-12x40 (SFP): Caution. This specific model is a 1-inch tube, not 30mm. If you have this version, you must ensure you have the 30mm SPRM™ mount and use 1-inch reducers/inserts, or purchase the specific 1-inch version of our rings. Additionally, its mounting space is tighter (approx 5.3 inches), but it will still fit.