Smooth and quiet - Armaspec AR-15/AR-10 Stealth Recoil Spring

This gone into my new AR-15 300 Blackout Build. It came ready to use. Goes in easy. I'm using this injunction with a gas piston bleed off system and in my initial test it fired very smooth and quiet. I'm still testing this build. After I get my silencer and fire some subsonic ammo I will give another review. I will test this recoil spring on this firearm for now but I think eventually i will get this for my other AR too. If your going to buy one of these recoil springs, Make sure to email or call the company to get the right model for your Firearm. Tell them your barrel length and if you have a gas piston system or not and any other think that makes your gun unique.