FYI, I just received a new X-products lower and fit and finish are excellent. I waited a long time but they were very responsive to my requests for updates and I am glad I stuck with it. Ordered in April as a "pre-order" and received it today. Very happy with the product. It adds exactly 5 oz so not too heavy. I wanted to keep my factory lower intact so I sourced a Geissele trigger when they had the sale on blemished parts and got it for $225 I believe. Some lower parts are hard to get right now but I found a complete set on gunbroker from Handl Defense for $250. The lower was $337 on sale.