http://www.brownells.com/rifle-parts/receiver-parts/receivers/upper-receivers/ar-15-primary-build-kit-sku080001146-71354-150409.aspx?sku=080-001-146&cm_mmc=Email-_-Spop-Email-_-lm_11389142-_-www_brown...
Type: Posts; User: steven
http://www.brownells.com/rifle-parts/receiver-parts/receivers/upper-receivers/ar-15-primary-build-kit-sku080001146-71354-150409.aspx?sku=080-001-146&cm_mmc=Email-_-Spop-Email-_-lm_11389142-_-www_brown...