Considering a 13.9” upper to go with my 18” 6.5 Grendel.. thoughts?

thedude824

Sergeant of the Hide
Full Member
Minuteman
Oct 7, 2020
225
168
Tampa FL
I recently built an 18” 6.5 Grendel with a NightForce NX8 2.5-20x
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I went with the superlative arms piston system, but the BCG is tight in the upper so I may swap it over to DI with a superlative arms adjustable gas black and JP FMOS.
After researching the round more it really seems to be great at everything. So I’m thinking it may be cool to build a 13.9” SBR upper to have superior capabilities compared to my 300blk out and 14.5” AR and far less blast and recoil than my 13” SCAR 17. If I do that it makes total sense to swap the superlative piston to the SBR and I would use a VLTOR MUR upper since the BCG fits perfectly in that upper (my 14.5” AR setup). What I’m really wanting input on is… optic arrangement. While I’d have the 18” upper for long range, the 13.9” should be very capable out to distance. So I was thinking of trying the Steiner T6XI 2.5-15x with an RMR mounted on top. I’ve never used a top mounted or offset RMR, but I’m sure I can train to become accustomed to it. I thought this set up would make more sense than another LPVO. I’ve got a Trijicon Credo 1-6x on my 14.5” AR and a Trijicon Credo HX 1-8x on my SBR SCAR 17. Thoughts?
Use would be run and gun and up to whatever distance the rifle is capable. I’m thinking of trying the Lehigh 110 grain copper solids and the 110 grain controlled chaos.