This is a really nice folding grip. I have purchased several and each one has mounted and preformed perfectly. One of my Airsoft M4’s has an extended barrel with a Bi-Pod and the grip folds towards the stock and Bi-pod toward the front. It still fits in the 48″ soft case and doesn’t cause problems zipping up the case as it did with a previous rigged grip. I did notice there is a one star review regarding a warble and he may have gotten a defective one…it happens. However…, there is an ever-so-slight movement in the swivel joint but it’s not enough to irritate you during a shot. Recommended, at least for Airsoft type guns, that can get pretty beat-up during skirmishes….