So after some more digging and some good advice from the members on here, I am rebuilding my two AR pistol uppers with Spike tactical Flat top uppers and BCG's, and realized my current Pistol barrels DO NOT have the M4 feed ramp extensions cut into them, while the Spike uppers I ordered do.
So should I try and have a gun smith attempt to refit the feed ramps on the barrel extension or just buy new barrels that already have them??

If I need to rebuy them who would you guys recomend?

What I'm looking for in a barrel: ALL Mil-spec if possible

1:7 twist
5.56x45 - .223 ammo will be limited to target shooting only
10.5"-12.5"
1/2x28 threaded barrel
Chrome Lined or Stainless*
M4 Feed ramps
MP HP tested

*Perfer Light weight*


Lesson learned, RRA is leaving a bad tast in my mouth The only thing I did right in my First AR build was use a Spike lower and Spikes lower parts kit... EVERYTHING else, well... will soon be Spike tactical or equivilant Mil spec.

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Did some more digging and reading and bought two of these...

http://www.rainierarms.com/?page=shop/detail&product_id=932

10.5″ CQB 5.56mm Barrel

■1:7 Twist improved polygonal rifling
■5.56 Noveske Match Mod 0 chamber
■Carbine length gas system
■M4 feedramps
■1⁄2 X 28 TPI
■Bead blasted finish
■1″ long gas block seat
■Pinned low profile gas block
■Medium Contour

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