nice looking rifle!!
do you think HiLux will make a cam to use on that mount?
are you noticing any elevation changes with that mount (not having a cam to hold it down)? or is the mounting point for the bases pinned?
how do you keep the 1 screw secured.
I had a generation 3 springfield mount and could not get it to stay tight for more then 7 rounds with loctite even.
I put a fiber washer between on my 1st gen ART and it works well,
does not come loose at all, (I crank it down too)
Pretty simple, I clean and de-grease both the bolt and the receiver hole and have used a dozen different single points with " none" coming loose. A problem many have is over torquing the bolt so it's tendency spring back causes trouble.
Also etching the mating surface of the bolt head and mount helps.
Very nice looking rifle! The XM-21 was an outstanding performer - used by Sgt. A. Waldron - who was the top scoring US sniper in Vietnam. He also used a PVS-2 night vision scope to very good effect - something the M14 could easily mount that the M-40/Marine Bolt guns could not, limiting them to daytime actions only. CC
Colt, Glock and Remington factory trained LE Armorer
LE Trained Firearms Instructor