Burris® XTR Signature Rings™

Tactical rings with Pos-Align® Offset Inserts for stress-free, perfectly centered clamping—and on-demand MOA cant without lapping.

Models & Item Numbers • What’s Included • Tech Notes • Install Steps • Setting Cant & Windage • Warranty • Resources Quick-Pick Insert Recipes • How it Works • Windage & Diagonal Corrections • Torque & What’s Included • Resources

Models & Item Numbers

All models mount to Picatinny (and most Weaver) rails and use Pos-Align® inserts. Torque specs shown are Burris current specs.

Item #	Tube Size	Height to Center	Finish	Top-Cap Torque	Cross-Bolt Torque
420210	34 mm	1.00 in	Matte	20 in-lb	45 in-lb
420211	34 mm	1.50 in	Matte	20 in-lb	45 in-lb
420221	30 mm	1.00 in	Matte	20 in-lb	45 in-lb
420222	30 mm	1.25 in	Matte	20 in-lb	45 in-lb
420223	30 mm	1.50 in	Matte	20 in-lb	45 in-lb
420231	1 in	1.00 in	Matte	20 in-lb	45 in-lb
420232	1 in	1.25 in	Matte	20 in-lb	45 in-lb
420233	1 in	1.50 in	Matte	20 in-lb	45 in-lb

Note: Older manuals reference a 40–70 in-lb range for the base clamp screws; Burris’ current spec is 45 in-lb on the cross-bolts. Use 20 in-lb on top-cap screws.

What’s Included (Insert Sets)

Concentric (0 MOA) inserts — one set
±5 MOA inserts — one set (≈ ±0.005")
±10 MOA inserts — one set (≈ ±0.010")
±20 MOA inserts — two sets (≈ ±0.020")
Possible cant combinations per set: 0, 5, 10, 15, 20, 25, 30, or 40 MOA. }

Tech Notes (Quick Reference)

No lapping needed: Pos-Align® inserts provide 100% scope-to-ring contact and prevent tube stress and finish marks.

Ring spacing matters: Total cant produced depends on the distance between ring centers (see chart in the manual). Typical spacing ~4–5".

Objective clearance tip: For long-range builds, lower the front of the scope and raise the rear (as clearance allows) to maximize elevation travel.

Torque: Top-cap 20 in-lb; cross-bolts 45 in-lb (Burris spec). If following the manual’s range, stay near 45 in-lb unless your rail/host specifies otherwise.

Installation — Step by Step

Prep & position: Verify the firearm is unloaded. Secure the firearm. Loosely position ring bases ~4" apart on the rail.
Choose inserts: Decide desired cant (0–40 MOA). Use matching pairs in each ring: + with − (e.g., +20/−20). “+” on the bottom raises that end; “−” lowers it. }
Eye relief: Set scope to highest power. Place scope in lower inserts; shoulder the rifle and slide to max comfortable eye relief.
Secure bases: Spread rings as far apart as practical; snug cross-bolts to 45 in-lb (see note above).
Top caps: Install upper inserts and caps. Level the reticle. Tighten cap screws evenly and alternately to 20 in-lb with equal gap both sides.

Setting Cant & Windage with Inserts

You can induce elevation and windage simultaneously by rotating inserts. Example from the manual: at ~4.75" ring spacing, if your group is 10 MOA high/right, rotate the front ring’s inserts ~45° so the “fat” (+) faces the error direction (up/right) and the “thin” (−) faces away—this steers the scope toward the point of impact. Alternatively, adjust the rear ring in the opposite sense. Fire a group and finish with scope turrets if you’re within ~3" of POI.

Example of achieving 25 MOA down-cant: Front ring −20 (bottom)/+20 (top) plus rear ring +5 (bottom)/−5 (top).

Care & Good Practices

No lapping required; do not modify inserts.
Re-check torque after first range session.
Keep gaps even on both sides of each cap for best alignment.

Warranty & Support

Covered by the Burris Signature Warranty™. For claims and details, visit the Burris Warranty page.

Resources

XTR Signature Rings — Product Page (specs, item numbers, torque). }
XTR Signature Rings — User Guide (PDF) (insert orientation, examples & spacing chart).

Quick-Pick Insert Recipes (Downward Cant for Long-Range)

Downward scope cant = objective slightly lower than the eyepiece. This increases usable “up” elevation for distance shooting. Recipes below assume typical ~4.75" ring spacing.

Target Cant (MOA)	Front Ring (bottom / top)	Rear Ring (bottom / top)	Notes
0 MOA	Concentric / Concentric	Concentric / Concentric	No cant
5 MOA	−5 / +5	Concentric / Concentric	Alternate: rear +5 / −5, front concentric
10 MOA	−10 / +10	Concentric / Concentric	All in front ring for simplicity
15 MOA	−10 / +10	+5 / −5	Front adds 10; rear adds 5
20 MOA	−20 / +20	Concentric / Concentric	Common PRS/NRL setup
25 MOA	−20 / +20	+5 / −5	Manual example configuration
30 MOA	−20 / +20	+10 / −10	Check objective clearance
40 MOA	−20 / +20	+20 / −20	Max included cant (uses both ±20 sets)

Tip: If your ring spacing isn’t ~4.75", actual MOA will vary slightly. Use the spacing/MOA chart in the manual to fine-tune.

How it Works (Orientation Basics)

Matching pairs: Use +5 with −5, +10 with −10, or +20 with −20 in the same ring. “+” in the bottom raises that ring; “−” in the bottom lowers that ring.

Best practice for long-range: Lower the front and raise the rear (as clearance allows). That maximizes usable elevation.

Windage & Diagonal Corrections (Rotate Inserts)

You can rotate inserts to add windage (or diagonal) correction. Use the “steer toward POI” method:

Adjusting the front ring: Rotate ~45°. Put the − insert toward the error and the + insert away from the error. This moves the front of the scope toward the POI.
Adjusting the rear ring: Orientation is the opposite: put the + insert toward the error and the − insert away. This moves the rear of the scope to point the optic toward the POI.

If your new group lands within ~3" of desired impact after rotating, finish with your scope turrets.

Torque & What’s Included

Included inserts: Concentric (0), ±5, ±10, and two sets of ±20 (supports 5, 10, 15, 20, 25, 30, and 40 MOA combos).
Top-cap torque: 20 in-lb. Cross-bolt torque: 45 in-lb (current Burris spec).
Legacy manuals show 40–70 in-lb for clamp screws; 45 in-lb is a safe target unless your rail/host specifies otherwise.

Related to