SmallRig HawkLock Quick Release Cage 3667C for Sony Alpha 7R V / A7 IV / A7S III / A1 / A7R IV / A7 V

Quick overview

If you’re building a more professional Sony Alpha setup, a camera cage is one of those purchases that only really makes sense once you start adding accessories. The SmallRig HawkLock Quick Release Cage (3667C) is designed to protect the body while giving you lots of mounting points for grips, cold accessories and more—without forcing you to disassemble your whole rig every time you swap platforms.

On paper, the big selling points are the built-in cold shoe location for add-ons (like an external mic or a light), the added HawkLock NATO rail for fast attachment of compatible HawkLock accessories, and the bottom quick release plate for Arca-style transitions between handheld, tripod and gimbal work. It’s not a lightweight “just for protection” cage—its purpose is very much to support a working rig.

What it’s for and the kinds of setups it suits

This cage is made for specific Sony Alpha models: A7R V, A7 IV, A7S III, A1, A7R IV and A7 V. In practical terms, that means it’s aimed at shooters who want to keep access to controls and battery areas while still adding mounting options where the camera itself is limited.

A good example of how it plays out on a typical day: you might start on a handheld run-and-gun setup with a top/side handle, then later move to a tripod for a steadier shot. Because it includes a built-in Arca quick release plate, you can make that transition without fiddling with lots of separate clamps. For gimbal-style work, it’s also built with compatibility in mind for DJI RS series stabilisers listed in the description.

You’ll likely get the most value if you already use (or plan to use) accessories that mount via 1/4”-20, 3/8”-16 (ARRI-style locating holes) or the HawkLock NATO system.

Key features that matter in everyday use

The cage uses a three-point locking approach: an improved side locating block with a positioning pin, plus a 1/4”-20 screw at the bottom. The goal is anti-deflection fixation, so the camera sits securely and doesn’t feel loose while you’re operating.

Protection is handled with built-in pads. These are there to reduce the chance of scratches and scuffs from regular handling.

Accessory mounting is where this cage gets more interesting. There’s a built-in cold shoe mount positioned on the upper right corner of the cage, intended for attaching devices such as a DJI Mic 2 or an LED video light. There’s also an added HawkLock NATO rail on the side, which is designed to let you quickly attach HawkLock accessories like side handles and top handles (IDs are mentioned in the base description).

Finally, there’s a built-in quick release plate for Arca at the bottom. That can help you go from handheld to tripod or gimbal faster, which is often the difference between “I’ll set it up properly” and “I’ll just shoot quickly and fix it later”.

Technical notes you should read before buying

A couple of compatibility details are worth taking seriously.

First, the description notes that this cage is compatible with the cable clamps for HDMI included in certain cage kits (IDs 4538, 4539), but it is not compatible with the cable clamp for HDMI (ID 3000) from other cage kits (IDs 3668B, 3669C). If you’re already invested in a particular HDMI cable clamp accessory, double-check which kit it came from.

Second, while the quick release concept is clearly laid out, “seamless transitions” depend on how your tripod/gimbal quick release plate is set up. The Arca quick release plate should be the basis for switching systems, but you’ll still want to ensure your stabiliser and mounts match the approach you’re using.

What to like, and where it may fall short

What you’ll likely appreciate: - The combination of protection and a rig-friendly mounting layout (cold shoe + HawkLock NATO + threaded mounting points). - The three-point locking design, aimed at reducing wobble. - The built-in Arca quick release plate to help with fast changes between filming setups. - Practical assembly convenience: the base includes a magnetic Allen wrench, intended for quicker assembly/disassembly.

Where it may not be the best match: - If you’re only after basic protection, you may find a full cage with rails and multiple mounting points is more rig than you need. - If you’re using HDMI-related cage kit accessories, the listed compatibility limitations are a potential hassle. - It’s designed for a specific camera family, it won’t suit owners of other bodies.

Worth considering if you want to build up your system gradually—but keep an eye on how your existing accessories mount.

Buying decision: what’s the right fit for you?

It’s a good fit if you own one of the listed Sony Alpha cameras and you’re actively adding accessories such as lights or an external mic (there’s a dedicated cold shoe mount), plus you want a quick, structured way to move between handheld, tripod and gimbal workflows using the built-in Arca quick release plate.

It’s not for you if you only need simple scratch protection, you don’t plan to mount handles/rails/accessories, or you already rely on a specific HDMI cable clamp system that the description says isn’t compatible.

If you’re the type of creator who changes setups often during a shoot day, this kind of cage design tends to earn its keep. If you mostly keep things static, you may be able to get by with a simpler solution.

Final verdict

Should you buy it? If you’re building a real rig around a compatible Sony Alpha body and you care about fast transitions and accessory mounting options, the SmallRig HawkLock Quick Release Cage 3667C looks like a practical, day-to-day workhorse. Just make sure your HDMI clamp accessories and any planned quick release setups line up with what the description says, because that’s where mismatches can cost you time.