Seems just as good as spikes and bcm - Smith & Wesson AR-15 Customizable Lower Parts Kit

Even though s&w doesn't use these in their rifles this seems like a high quality kit with machined parts. The key to a good lower parts kit is machined not mim parts. It would've been nice to see that they used Schmid selectors and safeties, but they don't. For the price it's worth it.