**For AR 22lr builds only. Replaces your buffer spring and weight**
Increase the reliability and accuracy of your AR22 with our Carbine Buffer Tube Block. Made and machine from solid Delron rod, this block applies solid pressure behind your favorite AR22 BCG like the CMMG or Bore Buddy system. Unlike other systems that still use your buffer tube spring, this solid buffer block keeps the BCG from moving under recoil. Allowing for repeatable headspace and bolt blow back. 
Length adjustment can be set via included 5/16 washers due to variations in uppers and AR22 BCG's. Simply add or remove washers as needed to get the right amount of preload.