26.5 mm Flare Gun Adapter Mount-- Flare gun barrel mount with Picatinny Rail to mount electronic Scope Mount. Using a Laser or Reflex Sights using the red or green reticle-- you can adjust these sights so that you are on target... No more guessing where the round goes. These 30 mm rings are made to fit the barrel of the AC Unity Flare gun. It should work with the H&K P2A1 , Polish M78 (H&K clone) & Others. ... If your Flare Gun is not a Unity- then you should measure the diameter of your barrel. If your barrel's outside diameter is greater than 30mm, then see my ebay ad for "26.5 mm Flare Gun Adjustable Mount 30mm - 37mm", with custom mounting inserts, No Flare gun & no sights included. Also look for our .22LR sub-caliber insert (Can be seem by clicking on "See Other Items). Condition is "New". Shipped with USPS First Class.