Will the Durasight DS610B Picatinny Rail fit my CVA Cascade Long Action rifle?

No, this specific model is strictly engineered for CVA Cascade Short Action receivers only. It features exact hole spacing for short-action calibres and is completely incompatible with CVA Cascade Long Action rifles, which require a different base such as the DS611B.

Why does this rail feature a 20 MOA elevation cant, and will it affect my ability to zero at close range?

The 20 MOA cant tilts the front of the rail downward to preserve your riflescope's internal elevation travel, allowing you to dial for bullet drop at extended distances beyond 300 to 500 metres. However, for short-range hunting under 100 to 200 metres, scopes with limited internal elevation adjustment might struggle to achieve a close-range zero, in which case a 0 MOA base like the Durasight DS113B is better suited.

What optic rings and mounting hardware are compatible with this rail?

The Durasight DS610B features a 6.7-inch one-piece MIL-STD-1913 Picatinny design that is also compatible with most Weaver-style optic rings. It comes supplied with 6-48 mounting screws, and pairs exceptionally well with options like the Durasight Z-2 Alloy Vertical Split Weaver Scope Rings for a secure setup on your outback hunting trips.

20 MOA Picatinny Rail - Durasight DS610B

The Durasight 20 MOA Picatinny Rail Base for CVA Cascade Short Action (MPN: DS610B) is a dedicated one-piece optic mounting platform engineered specifically for CVA Cascade short-action rifle receivers. Constructed from lightweight aluminum with a matte black finish, this rail bridges the receiver to provide a continuous MIL-STD-1913 Picatinny and Weaver-compatible mounting surface measuring 6.7 inches (approximately 170 mm) in length. Featuring a built-in 20 MOA forward downward slope, it preserves the internal elevation travel of your riflescope to facilitate dialing for bullet drop at extended hunting and target ranges. The base includes factory 6-48 mounting screws for direct receiver attachment.

Key Features

20 MOA Built-In Elevation: Cants the scope downward to maximise remaining upward elevation travel for long-range ballistic corrections.
One-Piece Picatinny Footprint: Spans 6.7 inches over the receiver, delivering uniform rigidity and flexible ring placement for proper eye relief.
Aluminum Construction: Provides a durable, zero-holding base while minimising added weight on field rifles.
Broad Ring Compatibility: Accommodates standard MIL-STD-1913 Picatinny and most Weaver-style scope rings and cantilever mounts.
Action-Specific Fit: Machined specifically to match the receiver contours and hole spacing of CVA Cascade short-action rifles.

Specifications

Brand: Durasight (CVA / BPI Outdoors)
Manufacturer Part Number (MPN): DS610B
Category: CVA Cascade optic rail
Receiver Compatibility: CVA Cascade Short Action only
Elevation Cant: 20 MOA
Overall Length: 6.7 inches (~170 mm)
Rail Standard: MIL-STD-1913 Picatinny / Weaver compatible
Material: Aluminum
Finish: Matte Black
Mounting Hardware: 6-48 screws (included)

Who is the Durasight 20 MOA Picatinny Rail for CVA Cascade Short Action for?

Long-range CVA Cascade short-action hunters — requires the 20 MOA built-in elevation angle across the 6.7-inch rail to retain sufficient internal scope adjustment when dialing for bullet drop beyond 400 to 600 metres using calibres such as .308 Winchester or 6.5 Creedmoor.
Precision target shooters using CVA Cascade rifles — benefits from the continuous 6.7-inch Picatinny mounting span and 20 MOA downward cant, which allows precise eye-relief positioning and extended dial travel for steel targets at long distances.

Less suitable for: CVA Cascade Long Action rifles due to receiver screw-hole spacing differences, and short-range hunting setups operating under 100 to 200 metres with optics having limited internal adjustment (less than 40–50 MOA total), where a flat 0 MOA one-piece rail base is better suited to maintain a close zero.

SKU	DUR40819LP
Model #	DS610B
Brand	Durasight
Shipping Weight	1.0000kg

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Durasight Ds610b Picatinny Rail 20 Moa Cva Cascade Short Action

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