Quote Originally Posted by Slippers View Post
I recently replaced a commercial extension tube on one of my lowers with the BCM mil-spec extension. It is indeed 6 position, and my Magpul ACS is quite solid on it.
http://www.bravocompanyusa.com/Stock...ware%20kit.htm

For a castle nut wrench I picked up an RRA stock wrench, which is $6.00 from brownells: http://www.brownells.com/.aspx/pid=1...4_STOCK_WRENCH

It engages three of the notches on the castle nut so it can't easily slip off.
Have you seen Spikes Tactical wrench? http://www.spikestactical.com/z/inde...q7c1m9auo47uk0

It is very nice looking and for 20 bucks it looks like a good buy. I also like their buffer tube aseembly kit. Good kit for the money I think. Anyway thanks for you help and insight