How do I select which Uni-Dot sight is best for my application?

Dot Size
In general, the smaller the rod, the better the accuracy. For fast sighting on moving targets, a larger rod like our 4mm is best. We recommend the following applications:
Trap 2mm P200 or P210
Skeet/Sporting Clays 2mm* P200 or P210
* If you have severe dominant eye crossover, we suggest the P100 for the larger dot size (4mm)
Hunting 3 or 4mm P100, P300 or P310
Dot Color
Select a color which will contrast with your background color, for instance, if shooting in the woods, choose a red dot.
Mounting Style
Riblock:  Most secure mounting style. Sight will include an adhesive strip to reinforce the fit.
Adhesive Mount:  Ideal for someone looking for a low profile sight line.
Standard or Day/Night
Standard Fiber Optic:  Best for daytime shooting.
Day/Night: Best for low light shooting.
Luma Ring or Standard
Standard:  Most shooting applications.
Luma Ring:  Excellent for turkey hunting.
Determining Rib Size
To determine the proper sight, first measure the width of the ventilated rib on your shotgun. This may be done either by taking an accurate measurement or contacting your gun's manufacturer. Next, check the Uni-Dot model you prefer for the optimum sight for your shotgun.
Mounting the Riblock Sight on a Shotgun
Uni-Dot sights require no alterations to your shotgun. You may mount Uni-Dot anywhere along the rib of your shotgun. Uni-Dot is made of high impact plastic. With your thumbs, spread the sides of the Uni-Dot out slightly at the open end. Then lace the open end on the rib and press the Uni-Dot down onto the rib one inch at a time. The Uni-Dot will bend and mould onto your rib. We recommend reinforcing the sight with the supplied adhesive strip.

 

Size Chart for Common Shotguns

This chart lists many common makes & models of firearms. To find the correct Uni-Dot for your weapon, find its make & model on the chart, and order the Uni-Dot part listed in the right columns.

Shotgun Manufacturer

 

Model

 

Rib Width

 

P100 Series

 


P210/P310 Series

 

In mm In mm

American Arms

20 G Sport Clay

0.25"

6.3mm

P109

1/4"

6.3mm

American Arms

Silver II Lite

0.25"

6.3mm

P109

1/4"

6.3mm

Benelli

Montefeltro

0.28"

7.1mm

P109A

1/4"

6.3mm

Benelli

Super Black Eagle

0.315"

8.0mm

P110

5/16"

7.9mm

Benelli

Super 90

0.315"

8.0mm

P110

5/16"

7.9mm

Beretta

303a

0.25"

6.3mm

P109

1/4"

6.3mm

Beretta

682

0.375"

9.5mm

P112

3/8"

9.5mm

Beretta

682 Gold Sp. Cl

0.437"

11.1mm

P114

Adhesive Mount

Beretta

682 Trap/Sport

0.39"

9.9mm

P112

3/8"

9.5mm

Beretta

686 Field

0.24"

6.1mm

P109

1/4"

6.3mm

Beretta

686 Onyx Sporting

0.47"

11.9mm

P115

Adhesive Mount

Beretta

686 Silver Pigeon

0.475"

12.1mm

P115

Adhesive Mount

Beretta

686 Silver Pigeon

0.5"

12.7mm

P115

Adhesive Mount

Beretta

686 Strata Rib

0.487"

12.4mm

P115

Adhesive Mount

Beretta

687 Field

0.235"

6.0mm

P109

1/4"

6.3mm

Beretta

687 EL Tapered

0.468"

11.9mm

P114

Adhesive Mount

Beretta

A390 Field

0.23"

5.8mm

P109

1/4"

6.3mm

Beretta

AL390 12g Gold

0.38"

9.7mm

P112

3/8"

9.5mm

Beretta

AL390 Field

0.24"

6.1mm

P109

1/4"

6.3mm

Beretta

AL390 Sport Sporting

0.4"

10.2mm

P112

3/8"

9.5mm

Beretta

AL390 Sporting

0.39"

9.9mm

P112

3/8"

9.5mm

Browning

325 American

0.437"

11.1mm

P114

Adhesive Mount

Browning

425

0.4"

10.2mm

P112

3/8"

9.5mm

Browning

A5 (Auto 5)

0.25"

6.3mm

P109

1/4"

6.3mm

Browning

BPS Pump

0.273"

6.9mm

P109A

1/4"

6.3mm

Browning

BT-100 Tapered

0.312"

7.9mm

P110

5/16"

7.9mm

Browning

BT-99

0.344"

8.7mm

P111

5/16"

7.9mm

Browning

BT-99 Max

0.25"

6.3mm

P109

1/4"

6.3mm

Browning

BT-99 Plus

0.28"

7.1mm

P109A

1/4"

6.3mm

Browning

Citori

0.35"

8.9mm

P111

5/16"

7.9mm

Browning

Citori Hunter

0.28"

7.1mm

P109A

1/4"

6.3mm

Browning

Citori Lightning

0.312"

7.9mm

P110

5/16"

7.9mm

Browning

Citori Plus

0.351"

8.9mm

P111

5/16"

7.9mm

Browning

Citori Upland Special

0.25"

6.3mm

P109

1/4"

6.3mm

Browning

Gold Hunter

0.24"

6.1mm

P109

1/4"

6.3mm

Browning

Gold Sport Clay

0.273"

6.9mm

P109A

1/4"

6.3mm

Browning

Gold Standard

0.31"

7.9mm

P110

5/16"

7.9mm

Browning

Golden Clays

0.39"

9.9mm

P112

3/8"

9.5mm

Browning

Citori Skeet Grade VI

0.38"

9.7mm

P112

3/8"

9.5mm

Browning

Superposed

0.25"

6.3mm

P109

1/4"

6.3mm

Browning

Ultra Sport O/U

0.437"

11.1mm

P114

Adhesive Mount

Krieghoff

K-80

0.375"

9.5mm

P112

3/8"

9.5mm

Krieghoff

KS-5

0.315"

8.0mm

P110

5/16"

7.9mm

Mossberg

5500 MKII

0.375"

9.5mm

P112

3/8"

9.5mm

Mossberg

835

0.375"

9.5mm

P112

3/8"

9.5mm

Mossberg

9200

0.375"

9.5mm

P112

3/8"

9.5mm

Perazzi

MX Tapered

0.275"

7.0mm

P110

1/4"

6.3mm

Perazzi

MX Straight

0.435"

11.0mm

P114

Adhesive Mount

Perazzi

MX-8

0.435"

11.0m

P114

Adhesive Mount

Remington

1100

0.3"

7.6mm

P110

5/16"

7.9mm

Remington

11-87

0.3"

7.6mm

P110

5/16"

7.9mm

Remington

3200

0.305"

7.7mm

P110

5/16"

7.9mm

Remington

870

0.3"

7.6mm

P110

5/16"

7.9mm

Remington

Peerless

0.295"

7.5mm

P110

5/16"

7.9mm

Remington

SP10 Auto

0.3"

7.6mm

P110

5/16"

7.9mm

Rottwiel

720 Super Trap

0.437"

11.1mm

P114

Adhesive Mount

Ruger

Red Label

0.33"

8.4mm

P110

5/16"

7.9mm

SKB

505 7/16 Rib

0.437"

11.1mm

P114

Adhesive Mount

SKB

Model 585

0.367"

9.3mm

P112

3/8"

9.5mm

SKB

Over & Under

0.37"

9.4m

P112

3/8"

9.5mm

SKB Century

Trap Single

0.47"

11.9mm

P114

Adhesive Mount

Weatherby

Orion

0.372"

9.4mm

P112

3/8"

9.5mm

Winchester

101

0.32"

8.1mm

P110

5/16"

7.9mm

Winchester

101 Pigeon Grade

0.41"

10.4mm

P113

3/8"

9.5mm

Winchester

1300

0.38"

9.7mm

P112

3/8"

9.5mm

Winchester

Model 12

0.312"

7.9mm

P110

5/16"

7.9mm

Winchester

Model 12 Trap

0.375"

9.5mm

P112

3/8"

9.5mm

 

 

  Model Chart for Common Measurements

Use this chart if your shotgun is not listed in the above table.

P210/P310 Series

P100 Series

 

Actual Size

 

Fits Rib Widths

 

In mm In mm

1/4"

P109

.255"

6.5mm

.230-.265"

5.8-6.7mm

1/4"

P109A

.290"

7.4mm

.266-.300"

6.8-7.6mm

5/16"

P110

.325"

8.3mm

.301-.335"

7.6-8.5mm

5/16"

P111

.355"

9.0mm

.336-.370"

8.5-9.4mm

3/8"

P112

.385"

9.8mm

.371-.400"

9.4-10.2mm

3/8"

P113

.410"

10.4mm

.401-.435"

10.2-11.0mm

Adhesive Mount

P114

.450"

11.4mm

.436-.475"

11.1-12.1mm

Adhesive Mount

P115

 

.500"

 

12.7mm

.476-.525"

 

12.1-13.3mm

Adhesive Mount

P116

 

.580"

 

14.7mm

.525-.600"

 

13.3-15.2mm