Scope ring height for 40mm objective, Input scope diameter, tube size and base height for results. Part of the problem is scopes not all scope are made the same so the glass might be 42mm add a adjustible objective and its even larger have a scope that does't have the adjustment and it will be smaller. Years ago all scope manufactures had Precision Machined for 30mm Scopes: CNC-machined for a perfect fit on all 30mm scope tubes. The outside objective diameter is measured from the bell itself, not the glass. Aug 1, 2023 · Scope ring height calculator to determine the correct ring height for the bases you are using. 50 mm (0. Get the right fit, guaranteed. Prob get away with med. The variety of 3/8 dovetail ring types allows 2 days ago · Real-World Testing: Putting Warne Mountain Tech 40mm Rifle Scope Rings to the Test First Use Experience My initial testing grounds were my usual, albeit somewhat cluttered, workshop bench, followed by a trip to the local shooting range. 850" height is ideal for scopes with objectives up to 50mm. Larue OBR, DTA SRS. Mounting low helps to maintain a proper cheek weld. if it was a 50mm or smaller so high should be plenty good enough I would imagine. Jan 18, 2026 · Most scopes 42 mm medium hight will clear your barrel. Feb 26, 2024 · In general, the goal is to get the scope as close to the bore as possible without the objective bell touching the barrel. Calculate Clearance: mount height + ring height - (bell diameter / 2) - cover wrap = 6. 50 mm your going to need hight rings have a barrel with minium taper it could need to go higher. Use our simple scope ring height calculator and guide to find the perfect rings for your rifle. they should have specs to what mm objective it should fit. Also if you have a tapered barrel, add that additional height gain as well. Feb 20, 2026 · These mounting rings are built to fit rifles with a 9–11 mm dovetail rail, while accommodating scopes with a 34 mm main tube. Ring height is from the top of the base to the bottom of the scope tube. Low-Profile Design: The . Scope's Outside Objective Diameter Scope Cover Thickness Rail to Barrel Clearance All provided measurements taken at 100mm from the front face of the action. Outside Objective Diameter Scope Cover Thickness Ring Height Rail to Barrel Clearance Set to 0 if using AR-style full rail i. There are formulas to measure the right scope ring height, but personalization is also required. The primary goal was to mount a 40mm objective scope onto a rifle destined for extended field use. . 26 inches) PASS! Dec 13, 2025 · After measuring 5 scopes, I found consistent patterns: most 40mm objectives need low rings, 44-50mm need medium rings, and 56mm+ need high rings – but your base height changes everything. 5 days ago · Types of 3/8 Dovetail Scope Rings A 3/8 dovetail scope ring is a precision mounting solution used to secure optical sights—such as scopes, red dots, and rangefinders—onto firearms equipped with a 3/8-inch dovetail rail. e. These rings are essential for maintaining zero, ensuring stability under recoil, and enabling quick adjustments when needed. Fits9–11 mm dovetail rails (common on air rifles, rim‑fires, older rifles). Ring Height Calculator Use the below calculator to work out what scope rings you need. There’s more than just math involved as you must account for your cheekweld. How-to Guides / Ring Height Ring Height This chart provides guidance on ring height, based on the outside diameter of your scope's objective. Eliminates guesswork for 1", 30mm & 34mm scopes.


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