• Length/Width/Height: 5.6” x 2” x 2.5” (143 x 51 x 64 mm)
• Weight:11.5oz (325 g)
• Water Resistant: Submersible to 33 ft. (10 m) depth
• Mount:1” Weaver or MIL-STD-1913 rail
• Brightness: 20 daylight settings 10 additional settings for Gen I through III+ night vision devices
• Power Source: Two 1.5 V AA batteriesSupports lithium, alkaline, or rechargeable
• Battery Life: Lithium: 1,000 continuous hours at nominal setting 12 at room temp. AA alkaline: 600 continuous hours at nominal setting 12 at room temp.

Frequently Asked Questions

Q: What's the difference between the 552 and the 512? A: Two things. First, the 552 has 10 dedicated night vision brightness settings that the 512 does not — if you use or plan to use night vision, you need the 552. Second, the 552 is submersible to 33 feet vs the 512's 10 feet. Everything else — reticle, size, weight, battery type, mount — is identical.

Q: How does it work with night vision? A: Press the dedicated NV button and the reticle drops to a brightness level that doesn't bloom or halo when viewed through an image intensifier tube (NVGs). You can mount the NVGs on your helmet and look through the sight, or mount a night vision monocular in tandem on the weapon rail behind the 552. The holographic reticle is a passive system — it doesn't emit visible or IR light from the front, so it's undetectable by enemy night vision.

Q: Which night vision generations does it support? A: Gen I, Gen II, Gen III, and Gen III+ (auto-gated). The 10 NV brightness settings let you dial the reticle intensity to match whatever tube you're running.

Q: Why would I pick this over the EXPS3? A: AA batteries. The EXPS3 runs on a single CR123, has a compact footprint with side buttons and a QD lever mount, and is the go-to for operators pairing with magnifiers. The 552 gives you the AA battery logistics advantage — if global battery availability matters to your use case, the 552 wins. The EXPS3 is the better choice if you want the smallest package and fastest mounting/dismounting.

Q: Can I use a magnifier with this? A: Yes. The 552 pairs with the EOTech G33 3x Magnifier or similar flip-to-side magnifiers. The rear button placement works with most magnifiers, though side-button models like the EXPS3 give slightly more clearance for the magnifier.