Discovery ED-PRS 5-25×56 SFIR Gen 2 Zero Stop Rifle Scope

Specifications

Key specs

Why this scope earns the pick

The ED-PRS Gen 2 is the honest top of the Discovery line. The differentiator is the Japanese Heuer FCD1 ED glass — extra-low dispersion glass that controls chromatic aberration (the colour fringing around high-contrast edges at max magnification). Most scopes under $1,500 USD don’t have ED glass. The fact that Discovery puts it in a scope under $800 CAD at the partner is why this model has the reviews it does — a verified buyer in the partner reviews says it has “noticeably superior glass” to an Athlon Midas BTR Gen 2 that costs several hundred dollars more.

The 34mm tube and 36 MRAD elevation range mean you can dial this scope from a 10-yard PCP zero out to centerfire ranges without running out of turret. The zero stop is non-negotiable at this tier — once you set your zero, the elevation can’t dial back below it. That’s what lets you spin to your max range and back to zero one-handed under stress.

What it pairs with

This is not the scope for a Snowpeak Lynx Gen 3 — it’s 1.26 kg of scope, longer than most PCPs’ scope rails, and the 56mm objective requires high rings that ruin the cheek weld on a wood-stocked rifle. The ED-PRS belongs on a tactical-stocked PCP (Reximex RP, Kral Puncher Maxi tactical, Snowpeak P15 chassis) or as a dual-use scope for a precision .22LR or 6.5 Creedmoor. If you own one of those rifles and you want this scope to work across both, this is the model that does it.

MRAD vs MOA at checkout

• Coming from a centerfire tactical rifle, used to dialing in mils → MRAD
• Coming from American hunting glass, used to MOA → MOA
• PCP-only build, no other rifles → MRAD (the 0.1 MRAD click value is finer than 0.25 MOA at the close ranges you’ll shoot)
• Plan to use this on multiple rifles in mixed clubs/leagues → whatever your shooting partners use

Honest trade-offs

The 1.26 kg weight is the headline trade-off. This scope is heavier than many of the PCPs you’d consider mounting it on. The 16.3″ length means you need a long scope rail — the partner sells a Picatinny rail extension if your rifle’s rail comes up short. The 25-yard minimum parallax means it’s not the right scope for backyard pest control under 25 yards — the HD 2-12×24 or HD 3-12×44 are better tools for close-range work.

But for the PCP shooter who has graduated to a tactical chassis and wants real precision glass without paying $2,000+ for a Nightforce or Vortex Razor, the ED-PRS Gen 2 is the most honest value in Discovery’s catalog — and probably the best glass under $1,000 in the partner’s entire scope inventory.

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