This part goes inside the E4 stock. It is not the Mag release button, but is rather the part that locks into your mag. If your MSAR E4 rifle has the factory plastic part, it either has broken, or will break.
This part is made of laser sintered reinforced nylon. Thank you to all the customers who participated in field testing this part. As of 2019 we have sold about 100 of these, and have had zero reports of parts brakage or other issues. We are offering this part with our standard lifetime refund/ replacement policy.
We will not be offering the special microtech tool. But replacement fasteners are a possibility in the future.
Allow up to 2 weeks for delivery. Limited stock on hand.