I ordered the product months ago and it still hasn't been delivered. Maybe its because of covid-19 but either way I would not recommend purchasing this product during this pandemic. I soon learned that you don't even need to buy this. Just remove the stock point you want to modify from your blaster, and just saw off the back part of it. This product is only useful if you don't own a saw.
Great for a quick mod (specially for people like me that are to lazy to cut the stock end cap) easy to put on. Just a side note it doesn't come with the screws to attach on to your blaster. The stock ones won't fit (unless it's just mines) but had extras that fit well. Non-the-less great little time saver.
This looks like a part you would need if you want to put a worker simple stock on your retaliator. The original retaliator tail piece doesn't let you fit that stock onto the retaliator blaster. You could mod your tail piece/end cap or just buy this part and change it out. BTW if you are thinking of adding a expanded type plunger tube for the retaliator using the prophecy expanded plunger tube, this part along with the worker simple stock will allow you to use the 25N worker long spring that the modification requires.