Just wondering if anyone finds the RS uppers to be too tight to fit the cylinders?? I have a Colt SP1 ,an A2 not sure of make (got it in a trade) and now I just got 2 Armalites .And of the four none of them fit my 4 cylinders.
I've just started to lap the Colt ,the lapping compound I have is fine ,so it's taking time
,but it is opening it up slowly.
All the threads I've read ,no one has mentioned this.I have a tool being made to cut the back end of the upper for the step in the cylinder.The other cuts I'll build a jig for the dremel
wish me luck LOL