Trijicon individually tests every optic at the factory before it ships — this is part of their standard quality control process. The testing process may leave minor cosmetic marks from test fixtures or light handling. These marks do not affect function, zero retention, brightness performance, or warranty coverage. The optic arrives ready to use and fully covered by Trijicon’s limited lifetime warranty.

Lock-out and lock-in are button behavior modes that control how the SRO manages brightness activation. In lock-out mode, the brightness adjustment buttons are disabled for manual input — the optic operates exclusively in automatic brightness mode. This prevents accidentally changing brightness settings during a stage or draw. In lock-in mode, the user selects a specific manual brightness setting and the optic holds that level indefinitely, ignoring the auto-brightness sensor. The selected setting stays locked until you intentionally change it. Both modes give competitors the option to have the optic’s brightness behavior fixed and predictable for the duration of a match, either trusting the auto-sensor or locking to a chosen level.

Both are accurate in different ways. The SRO includes two very low-output brightness settings designed to reduce dot intensity in low-light environments — these are sometimes marketed as "NV modes" because their output level is low enough to be usable alongside some night vision devices in practice. However, Trijicon does not certify or market the SRO as night vision compatible in the same way they do for purpose-built NV-compatible optics. The spec sheet rating of Non-Compatible reflects that official certification position. If confirmed night vision compatibility is a requirement for your use, the SRO is not the appropriate choice and you should look at NV-rated optics. If you simply want very low brightness settings for indoor use or low-light environments without NV devices, the SRO’s low-output settings cover that.

The SRO and RMR share the same mounting hole pattern and screw spacing, which means the SRO fits any slide that is cut to the RMR footprint. However, the SRO’s body is physically larger than the RMR — its wider window opening means the optic extends further to the sides. In most cases this is not an issue: the optic seats and secures correctly on any RMR-cut surface. Where it can matter is holster fitment. Some RMR holsters are sized to the RMR body profile and may not clear the SRO’s wider housing. Before purchasing a holster for an SRO, verify with the holster manufacturer that their RMR-compatible holster is SRO-compatible as well. Most major competition holster manufacturers (Safariland, Competition Tactical, CR Speed, and others) offer SRO-specific versions of their popular designs.

Dot size in MOA represents the angular diameter of the dot in your field of view at distance. A 1 MOA dot covers 1 inch of target area at 100 yards — significantly smaller than a 3.25 or 6.5 MOA dot. For competition shooting, a smaller dot offers two advantages: it obscures less of the target (important for precision scoring zones at distance), and it is physically more precise for calling shots. The tradeoff is acquisition speed under time pressure at close range — a larger dot is faster to find in the window. Most competition shooters who train regularly adapt to 1 MOA quickly, and for divisions with distance stages or points-based scoring, the 1 MOA is generally favored. The SRO’s larger window partially compensates for the smaller dot by giving the eye more field of view in which to find it.