Browning Invector DS Pro Extended Choke 12B

An original Browning Invector DS Pro choke to fit the new model B825 and also B725 shotguns. These are not compatible with the Invector Plus or standard Invector system. The Invector DS Pro chokes are labelled up by their constriction.

Invector DS Pro Constriction Guide (Lead shot)

Cylinder - Constriction - 0"- Marking 0

Skeet - Constriction - 0.0005" - Marking 5

1/4,Imp Cylinder - Constriction - 0.010" - Marking 10

3/8, Light Mod - Constriction - 0,015" - Marking 15

1/2, Mod - Constriction - 0.020 - Marking 20

5/8, Light Imp Mod - Constriction - 0.025 - Marking 25

3/4, Imp Mod - Constriction - 0.003 - Marking 30

Light Full - Constriction - 0,035 - Marking 35

1/1,full - Constriction - 0.040 - Marking 40

X Full - Constriction - 0.045 - Marking 45