My Hoffman Tactical TPU 3d Printed AR pistol in 300 Black out. Will flexible filament work?

I slightly modified the design, adding a double rib and increasing the buffer tower area to increase the rigidness of the lower.
Printed with 95a TPU.
Want to support the channel? Buy some reloading case lube!
https://www.amazon.com/s?i=merchant-items&me=AJPCPNTLWYLLN
https://www.ebay.com/str/hilineprecision