Choke Tubes, Invector

Browning offers the Standard Invector Choke Tubes in constrictions ranging from Cylinder to Extra-Full. They are flush fit do not extend beyond the end of the barrel. Standard Invector tubes are manufactured from of 17-4 stainless steel.1

gunsmithing notes:

      • Standard Invector Choke Tubes use a 13/16″-32 thread pitch. 2
      • The major diameter of the 13/16″-32 threads are .812″ but because of how the male and female threads fit together it will be closer to .809″. 3
      • To install screw in chokes for Standard Invector Choke Tubes use the Manson Precision ⇒ Win Choke Reamer and the Win/Rem Choke Tap. 4
      • The minimum safe outside barrel diameter to install Standard Invector Choke Tubes in a 12 gauge barrel is .850′-.855″.5 6

related:

      • Invector Plus
      • Invector-Plus Extended
      • Invector-DS
      • Extended Invector-DS
      • Invector-DS Turkey

general sources/notes: 7

footnotes/sources:

  1. “Standard Invector.” ⇒ Browning.com, Browning, 13 Aug 2018.
  2. Heraghty, Patrick, and Dave Manson. “Telephone Conversation with Dave Manson.” 10 Aug. 2018.
  3. Heraghty, Patrick, and Dave Manson. “Telephone Conversation with Dave Manson.” 10 Aug. 2018.
  4. Heraghty, Patrick, and Dave Manson. “Telephone Conversation with Dave Manson.” 10 Aug. 2018.
  5. Heraghty, Patrick, and Dave Manson. “Telephone Conversation with Dave Manson.” 10 Aug. 2018.
  6. This assumes that the bore is concentric to the outside diameter.
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