STANDARD INVECTOR, INVECTOR-PLUS AND INVECTOR-DS ARE NOT INTERCHANGEABLE. Make sure you know the system that fits your shotgun before proceeding. For advice on choosing a choke tube appropriate for your shotgun, READ MORE HERE.
The Standard Invector interchangeable choke tube system offers consistent, dense shot patterns with the right constriction needed for the shooting situation.
Threads on the breech end of the choke tube help prevent gases from slipping between the choke tube and barrel that could damage the choke tube and the barrel.
Standard Invector is standard on 10, 16 and 28 gauge, and .410 bore Citori 725, Citori, Cynergy and Gold shotgun models.
Standard Invector Shotgun Choke Tubes. The original Browning removable choke tube system.
On many shotguns, look for a barrel stamp that says "Invector" or "Standard Invector" like the one pictured above on autoloading and pump shotguns or on the monobloc of breakaway shotguns.
- Standard Invector choke tubes fit only shotguns marked Invector or Standard Invector.
- They never fit shotguns marked Invector Plus (+) or Invector-DS.
- 10, 16 and 28 gauge and .410 bore Browning shotguns usually utilize the Standard Invector system.