When you source precision optic accessories and tactical mounting
systems for distribution, OEM or ODM programs, a shared vocabulary saves time and prevents
spec mismatches. This glossary collects the terms B2B buyers meet most often across four product
families — Optics,
Mounts & Rings,
Rails and
Stabilization & Accessories. Use it as a quick
reference when reviewing quotations or comparing suppliers.
Optics — Sighting & Magnification
- Objective lens
- The front lens that gathers light; larger diameters improve low-light performance for outdoor optics.
- Reticle
- The aiming pattern inside the sight. Choices include illuminated, etched and BDC (bullet-drop) styles for shooting sports use.
- MOA / MRAD
- Minute of Angle and milliradian — the two adjustment units for elevation and windage. Pick one and stay consistent across your product line.
- Eye relief
- The distance from the rear lens to the shooter’s eye where the full field is visible; generous eye relief suits heavy-recoil platforms.
- Parallax
- Apparent reticle shift versus target at varying distances; adjustable side-focus parallax is preferred for precision work.
- First / Second Focal Plane (FFP / SFP)
- FFP keeps reticle sub-tensions true at every magnification; SFP keeps the reticle size constant. Both serve different buyer needs.
- Red dot / holographic sight
- Reflex and holographic options for fast close-to-mid target acquisition; see our
use-based optic selection guide for context. - Exit pupil & field of view
- Exit pupil (objective ÷ magnification) and field of view describe the brightness and width of the image — key for scanning wide areas.
Mounts & Rings — Secure the Optic
- Scope ring
- A two-piece clamp that grips the optic tube; matched to tube diameter (1″, 30 mm or 34 mm).
- One-piece mount
- A single base with integrated rings, often cantilevered, for repeatable alignment. Our
scope-ring selector explains fitment. - Return-to-zero (RTZ)
- The ability to remove and reattach a mount while keeping point of impact. Critical for QD field use — detailed in our
ring-height & RTZ guide. - Cantilever
- Forward offset that positions the optic comfortably while clearing the receiver; common on AR-pattern and modern sporting setups.
- Quick detach (QD)
- Lever or latch mounts that allow fast removal without tools while preserving zero.
- Recoil lug
- An anti-slip lip that transfers recoil into the base, preventing shift under repeated use.
- Material: carbon fiber vs aircraft aluminum
- Weight versus rigidity trade-off covered in our
material comparison.
Rails — The Interface Standard
- Picatinny (MIL-STD-1913)
- The dominant cross-slot rail; uniform slot width and spacing give broad accessory compatibility.
- Weaver
- Similar profile but with narrower, non-uniform slots — mostly legacy; many Picatinny parts still fit.
- Dovetail
- European-style wedge rail found on many precision and hunting optics; requires matching rings.
- M-LOK / KeyMod
- Slot-based handguard attachment systems for lights, grips and bipods — lighter than full rails.
- Cross-slot & recoil shoulder
- The repeating notch and stop that lock accessories in place under recoil.
For a practical compatibility walkthrough, read our
Picatinny vs Weaver vs dovetail selector.
Stabilization & Accessories
- Bipod
- A two-leg support for stable aiming; leg length, pan, tilt and QD Mounts vary by use. Our
bipod buying guide breaks down the options. - Cant / pan / tilt
- Adjustment axes that let the support track a target smoothly without breaking position.
- Mono-pod & tripod
- Rear and stationary supports that extend hold time for precision and observation.
- QD sling & swivel
- Hands-free carry hardware that pairs with mounting systems for field mobility.
- Recoil reduction
- Brake and buffer accessories that soften impulse — selected to match optic and mount ratings.
Buying & Maintenance
Spec sheets only tell half the story. Our
maintenance & calibration guide
extends service life, and the
OEM/ODM capabilities page covers sampling lead time,
NDA and private-label options for distributors.
Talk to KRS
KRS supplies optical sighting solutions, precision optic accessories and
tactical mounting systems for shooting sports and outdoor optics through B2B distribution,
OEM and ODM programs. We do not sell to individual consumers — all engagements are business-to-business.
Request a quotation: message us on WhatsApp at
https://wa.me/8618300076352, or submit an RFQ via our
contact form. Share your target market, volumes and compliance requirements and our
team will respond with spec sheets and lead times.