Sightmark Tactical 30mm/1in LQD Cantilever Mount
One-piece scope mount · 30 mm, 1 in · QD · 1.5 in height · 7.9 oz · $120
Cantilever mount
A one-piece mount whose rings sit forward of the rail clamp, usually about 2 in. It moves the scope forward so a thermal's short eye relief works on an AR-15's flat-top rail.
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Optics it fits
Sightmark says: Generic 30 mm scope mount; Sightmark names no specific optics.
Interfaces match (calculated)
The optic maker's published mounting interface meets this mount's. That says the parts connect; it does not check eye relief, the length of tube free for the rings, or barrel clearance, and no maker has named the pairing.
| Optic | Why it matches | Tube center above the rail (calculated) |
|---|---|---|
| AGM Adder TS35-384Thermal scopes | 30 mm rings; AGM states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| AGM Adder V2 35-384Thermal scopes | 30 mm rings; AGM states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| AGM Adder V2 LRF 35-384Thermal scopes | 30 mm rings; AGM states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| AGM Adder V2 LRF 35-640Thermal scopes | 30 mm rings; AGM states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| AGM Adder V2 LRF 50-640Thermal scopes | 30 mm rings; AGM states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| AGM Adder V2 LRF 60-1280Thermal scopes | 30 mm rings; AGM states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR 6 384 2.5-20xThermal scopes | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR 6 384 3.5-28xThermal scopes | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
Show all 56 interface matches
| ATN ThOR 6 640 2-16x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR 6 640 3-24x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR 6 LRF 384 3.5-28x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR 6 LRF 640 2-16x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR 6 LRF 640 3-24x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR LT 160 3-6x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR LT 160 4-8x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR LT 320 2-4x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR LT 320 3-6x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR LT 320 4-8x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR LT 320 5-10x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR LTV 256 1.5-4.5x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR LTV 256 2-6x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR LTV 256 3-9x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR LTV 256 4-12x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR LTV 320 3-9x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR LTV 320 4-12x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR LTV 320 5-15x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR LTV 640 2-6x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR LTV 640 3-9x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN ThOR LTV 640 4-12x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN X-Sight 4K Pro 3-14x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN X-Sight 4K Pro 5-20x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN X-Sight 5 3-15x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN X-Sight 5 5-25x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN X-Sight 5 LRF 3-15x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN X-Sight 5 LRF 5-25x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN X-Sight LTV 3-9x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| ATN X-Sight LTV 5-15x | 30 mm rings; ATN states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| OneLeaf Commander NV400 4-52x50 | 30 mm rings; OneLeaf states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| Pulsar Thermion 2 LRF XG50 | 30 mm rings; Pulsar states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| Pulsar Thermion 2 LRF XG60 | 30 mm rings; Pulsar states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| Pulsar Thermion 2 LRF XL50 | 30 mm rings; Pulsar states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| Pulsar Thermion 2 LRF XL60 | 30 mm rings; Pulsar states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| Pulsar Thermion 2 LRF XP50 Pro | 30 mm rings; Pulsar states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| Pulsar Thermion 2 LRF XP60 | 30 mm rings; Pulsar states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| Pulsar Thermion 2 LRF XQ50 Pro | 30 mm rings; Pulsar states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| Pulsar Thermion 2 XG50 | 30 mm rings; Pulsar states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| Pulsar Thermion 2 XP50 | 30 mm rings; Pulsar states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| Pulsar Thermion 2 XP50 Pro | 30 mm rings; Pulsar states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| Pulsar Thermion 2 XQ35 Pro | 30 mm rings; Pulsar states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| Pulsar Thermion 2 XQ38 | 30 mm rings; Pulsar states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| Pulsar Thermion 2 XQ50 | 30 mm rings; Pulsar states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| Pulsar Thermion 2 XQ50 Pro | 30 mm rings; Pulsar states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| RIX Optics Leap L3R | 30 mm rings; RIX Optics states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| RIX Optics Leap L6R | 30 mm rings; RIX Optics states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| RIX Optics Leap L12R 1280 | 30 mm rings; RIX Optics states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
| RIX Optics LPR L6R | 30 mm rings; RIX Optics states a 30 mm tube | Sightmark gives a centerline height without saying where it is measured from |
Tube center above the rail is calculated only when the mount maker says where its height is measured from and the optic maker states a tube diameter; each blank says which figure is missing.
Specs
| Type | |
|---|---|
| Type Cantilever mount A one-piece mount whose rings sit forward of the rail clamp, usually about 2 in. It moves the scope forward so a thermal's short eye relief works on an AR-15's flat-top rail. | One-piece scope mount |
| Mounts to | |
| Clamps onto Picatinny and Weaver rails The slotted rails most mounts clamp onto. Picatinny (MIL-STD-1913) has evenly spaced slots of one width; Weaver slots are narrower and spaced irregularly. Weaver mounts fit Picatinny; the reverse not always. | Picatinny"Fits Picatinny rails"; spec sheet mount type: "Picatinny - LQD" |
| Quick-detach QD mount A quick-detach mount: a lever or throw clamp takes the scope off the rail without tools. Worth it only if it goes back to the same zero, so mark the rail slot. | YesLocking quick detach (LQD) lever with locking tab; tension set by an adjustable nut on the opposite side (manual) |
| Holds | |
| Holds | 30 mm, 1 in rings30 mm rings; manual: "1” reduction rings (SM34019, SM34020, SM34021)" included |
| Ring size Ring size The inside diameter of scope rings: 1 in (25.4 mm), 30, 34 or 35 mm. It must equal the scope's tube diameter. Many thermal scopes have a 30 mm tube; others take only their maker's mount. | 30 mm, 1 in (25.4 mm) |
| Geometry | |
| Height, as published Scope height over bore How far the scope's center sits above the barrel's center. It decides your cheek weld and the bullet's path at close range. We calculate only the part above the rail, where makers publish it. | 1.5 in (38.1 mm)Centerline height (in/mm): 1.5” / 38.1 |
| Where the height is measured | Centerline height; the maker does not say where it is measured from |
| Cantilever Cantilever mount A one-piece mount whose rings sit forward of the rail clamp, usually about 2 in. It moves the scope forward so a thermal's short eye relief works on an AR-15's flat-top rail. | Yes |
| Forward offset Cantilever mount A one-piece mount whose rings sit forward of the rail clamp, usually about 2 in. It moves the scope forward so a thermal's short eye relief works on an AR-15's flat-top rail. | Not publishedOffset: the store page and spec sheet list "2” forward offset" for the family, but the user manual's feature list ties "2” forward offset" to SM34021 and SM34024 only, so offsetMm is null for this SKU. |
| Built-in cant | 0 MOA |
| Length | 6.9 in (175 mm) |
| Torque | torx scope ring screws 22-25 in-lbs (spec sheet and manual) |
| Weight and build | |
| Weight Weight How heavy the device is. Check whether the maker weighed it with or without the battery, because brands do it differently. | 0.5 lb (0.22 kg)7.9 oz (spec sheet; ounces only) |
| Material | Aluminum 6061-T6, matte black |
| Buying | |
| Made in | Not published |
| Warranty Warranty How long the maker promises to repair or replace a faulty unit. Check whether it needs registration and whether it passes to a second owner. | Not published |
| Maker part number | SM34020 |
| US price US price The price we found for the unit in the US, with where it came from and when. Prices change often, so treat it as a snapshot. | $120Sightmark store (sightmark.com) |
Values from the per-SKU spec sheet table, which the store page's combined "or" table leaves ambiguous. Built-in 20 MOA slope: "No" (spec sheet). Spec sheet width 1.81 in / 46 mm (fixed SKUs: 1.29 in / 33 mm).
Source: Sightmark store, Tactical 30mm/1in Cantilever Mount page (SM34019, SM34020, SM34021), Sightmark spec sheet (PDF, SM34019, SM34020, SM34021), Sightmark cantilever mounts user manual (PDF, SM34019-SM34024).
Added October 12, 2026 · Specs last checked October 12, 2026
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