JP Enterprises AR-15 Rifle Length Tuned Buffer Spring

This JP Enterprises operating spring fits small frame AR-15 rifles with a rifle length buffer tube. It is centerless ground and polished, so it rides smoother and quieter inside the tube than a standard wound spring.

JP reports better impulse feel from these springs, which helps you get back on the sights faster and adds reliability. Make sure your rifle has a rifle length tube before you order; JP sells a separate carbine length spring.