The Foundation for Accuracy

ZRODelta is a U.S. manufacturer of optic mounting systems, muzzle brakes and other precision shooting accessories.

We are owned and operated by a small team of individuals who are passionate about shooting sports, hunting and related pursuits.

Our range of scope and optic mounts are designed around the precision machined DLOC mounting system. The patented DLOC quick disconnect design provides a true Return to Zero capability when detached and reattached to your M1913 rail, providing you the ability to change optics from daytime to nighttime while maintaining accuracy. No tools are needed to install a DLOC mount to your rail, making it even easier to use when hunting and in low light conditions.

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ZRODelta (formerly Alamo Four Star) is a world-wide leader in firearm accessories for military, recreation, and sport shooting needs. Our work stands apart in quality and effectiveness. With our patented and patent pending products, you can be certain that any critical firearms need is met and exceeded in even the harshest conditions.

All mounting products are fashioned around the patented DLOC M1913 rail interface. The DLOC uses a unique rail interface that allows for consistent zeros and a damage free method of attaching accessories to the M1913 rail allowing to quickly change optics without needing to re-zero your rifle every time.

Our Cowl Induction Break reduces recoil by up to 72% while managing muzzle rise and reduces sound directed toward the shooter. Our cross milled port design redirects escaping gas to increase efficiency over the standard muzzle break, reducing recoil and adding to the enjoyment of time spent at the range.

We pride ourselves as a U.S. based manufacturer of quality optic mounting systems and accessories for precision shooting, and bring our passion and innovation to work with us each and every day.