Excellent folding adapter! - MDT 2-Way Folding Stock Adapter

This adapter is excellent! Mounted the Fixed to Fixed on my Sig556 using a Magpul UBR. When u open the box, at 1st it seems the adapter is too stiff & hard to fold. Buy once installed, the leverage with stock mounted gives it tge perfect amount of resistance to where it wont flop around when folded, yet still easy to unfold quickly. The quality is superb.
TO HELP WITH MANY QUESTIONS: THIS ADAPTER WILL ONLY WORK ON AR15's THAT USE A SHORT STROKE GAS PISTON SYSTEM! IF U HAVE A TRADITIONAL AR15 THAT USES DIRECT GAS IMPINGEMENT, THEN THIS ADAPTER WILL NOT WORK, CONTRARY TO SOME OF THE "EXPERT" ANSWERS IN TGE QUESTION SECTION. The BCG on traditional AR15's needs to be able to go all the way back into the stock/receiver extension/buffer tube to cycle properly. This adapter doesn't allow the BCG to go past the end of the receiver. Short stroke piston AR's & AR style bolt action rifle chassis ONLY!