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[bender152]

What's the big deal about calling a gun an "SPR" anyway? To me, the term "SPR" does not imply "better".

I have 2 18" uppers, both shoot equally well. One is an Mk12 clone, I call it an SPR. The other one has a scope and rail and all that, I call it an "18" upper" or "my White Oak upper" (as per the barrel).

[Droppin Deuces]

Just because two rifles of different specs can shoot tight 5 shot groups doesn't necessarily mean they are equal. I would imagine a rifle built with the role of an SPR in mind probably retains a level of performance and accuracy under sustained rapid fire that a "regular" upper would typically not retain.

Just a thought.

[gau17]

My MK12 Mod 0

[cabinetguy]

Well the regular SPR is chambered in 6.8SPC

Care to give some sources on this gem?

[Droppin Deuces]

I did this one using a complete LaRue chassis assembled around a Shilen/Rainier Ultramatch SPR barrel. She's a gem! Shoots just fine with the scope mount I pieced together, so not going to drop $200 on an LT107 just yet.
I wasn't looking to copy or replicate a particular model or build - only to put together the best example I could of what I thought an SPR should or could be using the best barrel I could find.

The scope is a Weaver Tactical 3-15x50 EMDR(highly recommended).

[DinoPJR]

I want an SBR. pretty leaves FMJBJ