The factory flexi-tab conversion switches out three assemblies: the shell carrier and carrier dog, the slide (floorplate for the bolt) which is modified with a pair of relief ramps, and the bolt which has a relief cut on the bottom side at the front. Cost is $75.
Simply cutting a tab into the carrier may not improve the weapon's reliability and, in fact, may impair it. Misfeeds and double feeds which occur routinely are usually caused by a defective or broken shell latch.
The clearance procedure for a misfeed in an 870 without the felxi tab modification is not difficult and can be done relatively quickly. With safety engaged and the muzzle up, drive the butt of the weapon against an unyielding surface while depressing the action bar release and pulling the slide to the rear. Double feeds, on the other hand, are time consuming and may even require disassembly of the weapon.
[This message has been edited by SKN (edited September 01, 2000).]