Behold the Leber SP5 printed designed by S3ig2 and professionally printed by Harrison Gunworks with three position D2 super safety installed. If you know, you know. This is a catch and release. I ran through 10 full magazines, 300 rounds, without a single failure. I have a compatible trip available that I printed myself which I will throw in for free. The trip is the same one used on my aluminum lower and has lasted over 1k rounds without a single hiccup or mouthfunction. This lower is only compatible with an HK SP5 and is drop in ready. I'm happy to answer any questions and I stand by this lower 100%.