Premium 9mm bolt - JP Enterprises EnhancedBolt 9mm AR Bolt Carrier Group (BCG) Kit - JP Short Silent Capture Spring

Anyone who has ever built an AR-9 knows that getting it to run is challenging. I did a ton of research before building my AR-9, and I did not see this bolt combo being promoted very much, but I also didn't see any negative reviews. I took a chance on it, and I am happy with my purchase.

Some things to note: When you are building an AR-9, you want the combined weight of your bolt and buffer to be 24-26 oz. This way, the weapon will function comfortable with most ammo, both suppressed and unsuppressed. The way you get to that sweet spot with this buffer is 2 tungsten weights, 3 steel weights. You can also go for 3 Tungsten weights and 2 steel weights, and you should still be safe.

This bolt is compatible with LRBHO. I am using it in combination with the stern defense magwell adapter so that I can use m9 Baretta magazines, and I have had 0 malfunctions in the first 500 rounds. I am using a ballistic advantage 16" 9mm barrel. I have shot it fast, gotten it hot, used the cheapest crappiest ammo I can get my hands on, and this bolt chews through everything.

the recoil on this bolt feels very good for an m9. The spring is silent in the buffer tube, which greatly helps the feel of the rifle. It does have a bit of recoil, but the impulse is consistent, so you can run it fast with training. I use a Geissele 2 stage trigger, and have had no issues with light primer strikes.