Gentlemen,

I hope this is not too extreme of a thread drift, but here goes: I am in the planning stages for a build-up (will be purchased through Rainer) for a SPR/Police Marksman carbine. It's intended use is marksman/perimeter duties and will be 16 inch 6.8 (SPC II) with the Wilson TTU and TR24 Trijicon optic.

I am considering the Mega Tubular monolithic upper/matching lower. Your comments regarding the Adams system leads to my questions:

Should we stay with DI or consider a piston system? Are there any significant positive (or negative) attributes for a piston system on this purpose-driven platform?