LaRue 6.5 Grendel Rifles

[Kswhitetails]

I may be over reacting, but I have never had an upper and lower go together like this. Am I over reacting? Thanks.

No worries about the necro part, we love talking about our rifles.

My Rifle is perfect in form and function. The problem here is that everyone makes their own billet dimensions, and none of them are going to fit like they were made for the other unless upper and lower come from the same place, with the similar date of manufacture. Functionally, it should hold it's own rather well. If the fit of the outside dimensions is that much of a bother (as it sounds like it will continue to be) then shoot as is until the LaRue lower arrives. We now have discussions about the rifle, UU, and Surge all gumming up the works. This thread deals with the rifle, which has absolutely none of the fitment issues experienced above.

As far as the gap goes, if it passes a function test prior to firing, then fire it and see what works out. The LaRue crew obviously designed their billet pieces to be stonger in places it mattered, and lighter in the same way. If you read some of the first few posts in this thread LRRPF describes rather well how the final form of upper and lower were made for each other with subtle but surprising quirks and benefits. You will be well served by mating this upper with it's intended lower ASAP, and using another of your lowers as a place holder until then. I'd say you're on the right track.