Mounting guide
Stellar 4.0 L or LR? 30 mm Tube vs Rail Mount Explained
Plenty of buyers assume the LR is the upgraded Stellar 4.0. It's the same scope: the R marks the rail-mounting version, and the L sits in standard 30 mm rings. The sensor, lens, rangefinder, display and battery are identical, so choose by how your rifle is set up, not by the picture you expect to see.
For most Australian rifles on a Picatinny or Weaver base, we'd buy the L. The LR makes sense when your rifle is already set up for rail mounting and you want to keep that system.
Same scope, two ways to mount it
HIKMICRO's spec sheet lists the Stellar 4.0 SQ50L and Stellar 4.0 SQ50LR with the same 640×512 sensor, 50 mm F1.0 lens, 1,200 m rangefinder and battery setup. The SX75L and SX75LR pair up the same way around the 1280×1024 sensor and 75 mm lens. The diagram below shows the only two rows that change.
The LR weighs 65 g more than the matching L: 1,073 g against 1,008 g for the SQ50, and 1,140 g against 1,075 g for the SX75, each with the removable battery fitted. On a scope that already sits over a kilo, that's a small difference, though you'll still feel every gram on a long walk with a light rifle.
Battery life doesn't change either. HIKMICRO rates the SQ50 versions at up to 9.5 hours and the SX75 versions at up to 7 hours, at 25 °C with the rangefinder on.
How each version attaches to your rifle
The L has a standard 30 mm tube, so it clamps into a pair of 30 mm rings, and the rings sit on your rifle's base. That's the setup most Australian hunting rifles already use. The LR is built for rail mounting instead, so it attaches through a rail-compatible mount rather than rings. The diagram below shows the two stacks side by side.
Say it's the night before you order, and the rifle's sitting on the kitchen table. Look at what holds your current scope. If you see two rings clamped around the tube and screwed down to a rail along the receiver, you're set up for rings, and the L will drop straight into that system once you have 30 mm rings at the right height. If your current scope attaches through a rail system with no rings at all, the LR may suit. Check with us first, because rail systems differ from one maker to the next.
Not sure what base your rifle has? Our guide to choosing between Weaver, Picatinny and dovetail rails shows how to tell them apart, and our scope rings range covers 30 mm rings for the L.
Which version we'd choose
For most shooters, we'd buy the L. Thirty-millimetre rings are easy to find in every height and style, you may already own a set, and a quick-detach pair lets you move the scope between rifles. It's also the lighter of the two.
Choose the LR only if your rifle is already set up for rail mounting and you want the thermal to use the same system. Its main drawback is that it needs a matching rail-compatible mount, so it's less flexible if you change rifles later. If that describes your setup, tell us your rifle and its current mount, and we'll confirm the LR suits it before you order. The flowchart below covers the decision.
Whichever mount you go with, the bigger decision is the sensor: the 640×512 SQ50 or the 1280×1024 SX75. Our Stellar 4.0 review covers that choice and the full spec sheet.
Compare the L and LR versions
Check the current price and availability on each product page.
Stellar 4.0 SQ50L Stellar 4.0 SQ50LR Stellar 4.0 SX75L Stellar 4.0 SX75LRStellar 4.0 L vs LR FAQ
What does the R mean in the Stellar 4.0 SQ50LR?
The R marks the rail-mounting version. The HIKMICRO Stellar 4.0 SQ50LR and SX75LR are built for rail mounting, while the SQ50L and SX75L have a standard 30 mm tube for rings. Sensor, lens, laser rangefinder, display and battery are the same across each pair, so the R changes how the scope attaches, not what you see through it.
Is the Stellar 4.0 LR better than the L?
No, the image is identical. The HIKMICRO Stellar 4.0 LR versions share the same sensor, lens, 1,200 m laser rangefinder, display and battery as the matching L versions. The only differences are the mount and 65 g of extra weight. Choose the LR only if your rifle is already set up for rail mounting; otherwise the L in 30 mm rings is the simpler, more flexible buy.
How much heavier is the Stellar 4.0 LR than the L?
The HIKMICRO Stellar 4.0 LR versions weigh 65 g more than the matching L versions. With the removable battery fitted, the SQ50L weighs 1,008 g and the SQ50LR 1,073 g, while the SX75L weighs 1,075 g and the SX75LR 1,140 g. Add the weight of your rings or rail mount when working out the total load on your rifle.
What mount do I need for a Stellar 4.0 LR?
A Stellar 4.0 LR needs a rail-compatible mount rather than scope rings. HIKMICRO builds the SQ50LR and SX75LR for rail mounting, and rail systems differ between makers, so the mount has to match both the scope and your rifle. Tell us your rifle and its current mount before you order, and we'll confirm what fits.
Can I use 30 mm rings on the Stellar 4.0 SQ50LR?
If you want to use 30 mm rings, choose the L version instead. HIKMICRO lists the Stellar 4.0 SQ50L and SX75L with a standard 30 mm tube for rings, and the SQ50LR and SX75LR with rail mounting. The optics and electronics are the same in each pair, so picking the L for rings costs you nothing in image or rangefinder performance.
Are the Stellar 4.0 L and LR the same size?
Yes. HIKMICRO lists the same dimensions for both versions of each model: 439.6 × 82.9 × 74.3 mm for the Stellar 4.0 SQ50L and SQ50LR, and 445.7 × 93.5 × 78.7 mm for the SX75L and SX75LR. Only the weight differs, by 65 g. Measure the space on your rail before you buy, especially on a short action.
Do the Stellar 4.0 L and LR have the same battery life?
Yes. Each L and LR pair uses the same battery setup: two built-in cells plus one removable 18650. HIKMICRO rates the Stellar 4.0 SQ50L and SQ50LR at up to 9.5 hours, and the SX75L and SX75LR at up to 7 hours, at 25 °C with the rangefinder on. USB-C charges the built-in cells; the 18650 needs a separate charger.
Can I move a Stellar 4.0 L between rifles?
Yes. A Stellar 4.0 L in quick-detach 30 mm rings, or rings on a quick-detach base, can move between rifles with the same type of base. The HIKMICRO Stellar 4.0 stores zeroing profiles, so you can keep a separate zero for each rifle. Always confirm your zero with a few shots after swapping, as no mount returns perfectly every time.
This guide is based on HIKMICRO's published Stellar 4.0 specifications.