Just for anyones info i have found a company in rigby Idaho that can take your ar15 trigger pull from about 7 to 8 punds from the factory. T O 4 POUNDS and redo your bolt also they can top it off with a barska red dot for a very very good price. I WAS VERY!!!!! HAPPY WITH THE JOB THEY DID FOR ME .if you have a 15 and dont want to spend the mony on a chip mccormick this is the answer. there called Quality Arms in Rigby Idaho they were very fast 4day turnaround on my work. i would totaly recomend them there number is 1 208 5424580 or jimbee@msn.com