12-14-2017, 03:36 AM
just_john Wrote:Buckster, bear in mind, the tighter the fit between upper and lower the more difficult to pin / unpin the upper to the lower. To facilitate field "emergancies" and because of multi-vendor manufacturing and manufacturing tolerences, there has to be a little slack in the build. Otherwise some parts would not be mate-able without a great deal of trouble. If you spent a lot of time in the field with an AR / MSR, would you like to have to carry a hammer and a punch to seperate the upper from the lower, just in case?
The Accu-wedge is a very viable solution to firm up that interface. Some of us ( myself included ) drill and tap the lower and install a snubber to take some ( but not all ) of that slack and wiggle out. There is another currently active thread about that.
Just_john, I understand there are multiple manufacturers and tolerances. But this gun was bought as a custom made gun and lbc machines the upper and lower in house and makes most of the parts that go in his guns. So he can control the quality and fit. That is why his guns cost what they do.