M4 Boxer Sticky Ends - Large

I have been messing around with modifying various stick ends for my Boxer and seem to have settled on these. I use a M4 insert from Amazon and they fit perfectly. (https://www.amazon.com/gp/product/B0CX8VQYWM/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1)These stick ends are pretty pointy and provide a lot of grip. Best in TPU