User Guide

Invector Interchangeable Choke
System
All A-500 shotgun barrels have been threaded to
accept the Browning Invector Interchangeable
Choke System. You may confirm this by looking
on the right side of your barrel where the
specifications are inscribed, and where the
choke markings are normally located. The word
INVECTOR denotes that the barrels are
threaded. The degree of choke tube is indicated
twice on each choke tube: Inscribed on the side
of the tube, and indicated with a “notch” code
on the top rim of the tube.
Invector Choke Tubes are made with tempered
steel and are fully compatible with all FACTORY
AMMUNITION (loaded in compliance with
SAAMI specifications) including Magnum lead
and steel shot loads and rifled slug loads.
DO NOT FIRE THIS SHOTGUN WITHOUT HAV-
ING AN INVECTOR CHOKE TUBE INSTALLED.
Permanent damage may result to the threads.
DO NOT USE BROWNING INVECTOR CHOKE
TUBES IN ANY SHOTGUN BARRELS NOT
SUPPLIED BY BROWNING. ALSO, DO NOT
USE ANY OTHER CHOKING DEVICE IN ANY
SHOTGUN BARREL SUPPLIED BY BROWNING.
USE ONLY CHOKE TUBES MARKED INVECTOR.
50