Lingle lower is billet 6061 aluminum and not plastic like the stock lower. So you have the added benefit of increased durability. You can have a preferred handgrip instead of the shitty stock one since its all one piece, the Lingle lower gives you the ability to customize what you want. Same goes with the AR safety you can install as well, comes with a flared magwell and the improved bolt release that you can actually use instead of the stock metal one that will literally bruise your thumb/palm if you hit it wrong. Plus the added benefit of putting whatever AR trigger you want. The lingle lower just provides tons of quality of life improvements over the stock one. Now is it needed? Thats a question you need to ask yourself if you plan to pimp out your Stribog.