Originally Posted by Jim S.
Without reading the many posts here I would like to say that I have well over 15,000 rounds through my G21 that has one of Mr. Grahams MGSL's in it.
I stopped keeping track at the 15,000 round count.
I have no indication of a problem with the piece or the gun.
Still working perfectly.
What's the deal with the change?
Seems when Glock changed their hardening methods,starting with the doted pentagon markings on the barrel some lockup engagement lug chipping with the use of MGSL was noticed.
Not a issue to me or any of my Glocks with the MGSL installed as my newest Glock was produced !!/05 prior to Glocks changes. SJ 40