Hi,
I'm the factory sales rep for ABS barrels.
I'd be happy to discuss the particulars with you.

Please contact me at the info listed in my signature line below.

Thank you,
Tom Lyons
MGI Military
ABS Barrels

Quoted: Tom, I would like to know how they have held up over long rapid fire sessions (i.e. 50-60 rounds) and then how the groups have held up over say from the first 10,000 rounds to the next 10k.  I'm in love with Oly barrels right now as with my accuracy/3-Gun load, they shoot sub-0.5 MOA (w/ 69gr. SMK's and Varget, no case prep and standard WSR primers). I'll PM you some more though. Thanks in advance, SPC Richard A. White, Senior Medic 249th MP Detachment (EACF) Camp Humphreys, ROK

Richard,
The ABS barrels do very well in long strings of rapid fire, and also in full auto.
That is where the improved cooling of the ABS barrels comes into focus.

As far as how well they do over time and high round counts, the cooling properties of the ABS barrels also help with that. In tests of 10k rounds, compared with a "control barrel" of a chrome-lined steel construction, the ABS carbon fiber barrel showed 63% less throat erosion in that test. As I'm sure you are aware, it is throat erosion that is the primary killer of barrels and their accuracy and velocity performance. So, you can expect  better than normal performance for a much longer time because of this.

Regarding your Oly barrel, 1/2MOA is very good performance from any barrel in an AR15, and you should be quite happy. I'm not going to guarantee that the ABS barrel will shoot any better than that, but it might. We've made some AR15 barrels that shoot under 1/4MOA, but not every barrel will do that. We guarantee that our barrels will shoot subMOA with factory match ammo, and we provide a test target that was shot each barrel at 100yds, to prove the performance, Generally, you can do better with tailored handloads, so you can tune it in to your preference. However, we can definitely say that the weight saving, cooling, and barrel life will be additional parts of the package that we provide in addition to excellent accuracy, so the ABS barrels do represent the best overall package available in an AR15 barrel today.