The buffer retainer is one of those components that absolutely no one thinks about once it’s installed. The little nub might help you time a buffer tube, but mostly it just keeps your buffer and buffer spring seated in your buffer tube when you open your receivers. This humble component can cause big problems should it break, sending the small nub that once retained your buffer to wreak havoc in your trigger group. To prevent this, Forward Controls Design offers the Reinforced Buffer Retainer. Features: 17-4 PH stainless steel bar stock Heat treated to H900 hardness