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American Rifle Company's M-Brace rings are what you reach for when you've got a quality 34mm scope and you don't want to gamble on the mount. These are the medium height version with a 1.10 inch optical centerline measured from the top of the rail to the center of the scope tube, and they're finished in matte black. The whole thing is CNC machined from high-strength 7075 aluminum and hard-coat anodized, so it shrugs off weather and holds up to abuse without looking like it.
The standout feature here is the split, hinged ring design. Instead of clamping the top half down and rolling your scope out of alignment the way traditional two-piece caps do, the M-Brace applies clamping force symmetrically. That means your reticle stays level while you torque things down, and since the scope never gets twisted during install, it stays torsionally relaxed and returns to zero cleanly if you ever pull it off. The inner surfaces grip hard without marring or indenting the tube, which matters a lot on an expensive optic.
These are built for Picatinny (MIL-STD-1913) rails and use a rail interface engineered to engage correctly even on rails that run a hair out of spec, which is a big part of why folks praise their return-to-zero. Hardware is stainless steel throughout, including a high-strength 410 stainless cross bolt. One thing worth knowing up front: ARC uses a single, larger-diameter scope clamp screw rather than a bunch of little ones, so the recommended torque is 55 in-lbs (6.2 Nm) on both the scope and rail clamp screws. That's higher than a lot of rings, and getting to spec is what keeps the scope from sliding, so a good torque wrench is your friend. ARC also recommends a touch of oil or anti-seize on the threads and skipping the Loctite.
Shooters who run these tend to come back for more sets. They've earned a reputation for easy setup, tank-like build quality, and not chewing up scope tubes the way some other brands can. If you're mounting a serious 34mm optic for long range, hunting, or precision work, this is a mount you can set and forget.
These rings are made specifically for scopes with a 34mm main tube diameter. The medium height gives you a 1.10 inch optical centerline measured from the top of the rail to the center of the tube. If you're not sure whether medium clears your objective bell, check your scope's objective diameter against the ring height before ordering.
American Rifle Company uses a single, larger-diameter scope clamp screw instead of several small ones, so it takes more torque to generate the same clamping force. The recommended spec is 55 in-lbs (6.2 Nm) on both the scope and rail clamp screws. Hitting that number is important, because under-torquing can let the scope shift under recoil, so a quality torque wrench is well worth using.
No. The M-Brace is engineered with a non-marring grip that holds the scope firmly even under heavy recoil without indenting or scratching the finish. This is one of the main reasons shooters trust them on high-end optics.
The M-Brace rings are designed for Picatinny (MIL-STD-1913) rails and use a rail interface that engages correctly even on rails slightly out of spec. They are not a quick-detach mount; they're a fixed clamp setup built for a solid, repeatable zero rather than tool-free removal.
| UPC | 810094450113 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MB-R-34-28 |
| Style | PICATINNY |
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