Primary Arms SLX 3-18x50 FFP Gen II Rifle Scope
- Magnification Minimum: 3x
- Magnification Maximum: 18x
- Objective Lens Diameter: 50 mm
- Night vision: No
Last refreshed Jun 22, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A clear, well-priced first focal plane scope with a genuinely useful calibrated reticle, best paired with a mid-range or backup rifle rather than a flagship build.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B0CJWBXPXBCategory: Rifle Scopes
More from this brandAll Primary Arms rifle scopesStyles Available
Need a different one? Pick on Amazon →
Overview
A first focal plane rifle scope from Primary Arms' SLX Gen II line, built around a 30mm tube with a 50mm objective and the ACSS Apollo reticle calibrated for .308 Winchester and 6.5 Grendel out to 1,000 yards. It includes illumination and Easy Stop return-to-zero turrets.
Because the ACSS Apollo reticle sits in the first focal plane, its holdover marks stay accurate at any magnification rather than only at one fixed power, which matters for the built-in wind and ranging references.
- First focal plane ACSS Apollo reticle
- 30mm tube, 50mm objective, Gen II glass
- Easy Stop return-to-zero turrets, 0.1 MIL clicks
- Calibrated for .308 Winchester and 6.5 Grendel
Who it's for
Suits shooters who want an FFP scope with a calibrated BDC reticle for .308 or 6.5 Grendel without spending at the premium tier.
Pros and cons
- FFP reticle stays calibrated across the full zoom range
- Built-in reticle references for .308 and 6.5 Grendel
- Backed by Primary Arms' transferable lifetime warranty
- Reticle hard to see without illumination on some backgrounds
- Distortion noticeable around the edge of the field of view
- Turrets feel less tactile than premium optics
- Magnification ring can be stiff to rotate
Specifications
| Brand | Primary Arms |
|---|---|
| Dimensions & fit | |
| Objective Lens Diameter | 50 mmhigher than 69% of 309 rifle scopes |
| Item Weight | 2 poundshigher than 81% of 238 rifle scopes |
| Construction & materials | |
| Material Type | Aluminum |
| Color | Black |
| Compatibility & installation | |
| Compatible Devices | Rifle |
| Warranty & support | |
| Warranty Description | Limited lifetime |
| Other details | |
| Magnification Minimum | 3x |
| Magnification Maximum | 18x |
| Night vision | No |
| Sport Type | Shooting |
| Reticle Type | BDC |
| Item Type Name | Rifle Scope |
Closest rivals on specs
Compare all side by side
Frequently asked questions
What calibers is the ACSS Apollo reticle calibrated for?
Primary Arms calibrates it for .308 Winchester and 6.5 Grendel, with ranging references out to 1,000 yards.
Does this scope come with a warranty?
Yes, it's backed by Primary Arms' Limited Lifetime Warranty, which is transferable to any future owner without proof of purchase.