I'd recommend the Condor MCR4 OPS Chest Rig instead of the others (MCR 3, 5, or 6):
https://www.condoroutdoor.com/Condor-MCR4.aspx
Alternatively, the MCR-7.
People have opinions on Condor. Much of it is regurgitated internet commentary rather than having actually owned/used some of Condor's products. My opinion on their chest rigs and pouches has changed over the years:
http://www.survivalistboards.com/showpost.php?p=5774741&postcount=11
I prefer a blank slate when it comes to MOLLE chest rigs. Something I can add my own selection and optimized arrangement of pouches to. The MCR4 offers some features that make it better than the plain MCR3. Better map pocket design plus inclusion of two integral side pouches. I believe it also has a few more columns of PALS channels.
I own and use a Multicam version of the MCR4 rig. Quite satisfied with it for what it is. I like the hidden side pouches and front map pocket. A split front rig (like my Tactical Tailor MAV or the Condor MCR7 Ronin) is more convenient for ease of donning and doffing. A split front also allows you to unbuckle from the front to get a little flatter into micro terrain when prone. But the solid front MCR4 isn't really bad in that regard and offers a little bit more pouch real estate than the typical split front rig (more vertical PALS channels).
I strenuously avoid the Tactical Michelin Man Look (layers upon layers of pouches extending out to the front. I like a nearly flat, close to the torso, one-pouch-layer rig. Makes for easier going when operating vehicles, egressing from vehicles, going prone/low crawling, and when trying to roll over obstacles like window sills, walls, roof parapets, balcony railings, gates, etc. Those are important things to consider. Life is not a flat range where you spend all your time erect on two feet.
Whichever rig you choose, I'd recommend getting the modular hydration harness that attaches to all their MCR chest rigs. It's a really decent hydro carrier and shoulder harness assembly. 2.5 liters of bladder plus room for some odds and ends. Plus some rear MOLLE real estate for a back pouch or two. I have one of those too:
https://www.condoroutdoor.com/Condor-242-008.aspx
I'm now retired from a fairly lengthy and adventurous military career. One where I wore this kind of gear routinely in training and combat. Like... really wore it. A lot. For decades.
I own several different chest rigs today. Tactical Tailor, Blue Force Gear, etc. But my primary set up for home defense and local patrol of my property is that previously mentioned MCR4. It's as good as most anything else. The materials, sewing, and design are pretty damn good for not much money. I'm satisfied that it won't fall apart under a load and can take quite a bit of getting scuffed up.
I don't say that lightly. Or without deep experience at putting such gear through its paces.