Originally Posted By: SwitchUPDATE:
As mentioned the upper was sent back to CBC Industries. They mentioned that the repair should be quick and that they would test fire the upper. The upper was in their shop for a little over a day and on its way back to me. That's about as prompt as it gets.
The FedEx package arrived yesterday. The packing slip stated that the unit had been repaired (new gas block assembly) and test fired eight times.
I wasted no time in installing the upper and I headed out this morning to test fire the rifle.
I first ran the single round test in the mag…after the round was fired, the bolt remained back and the chamber open. That is the first time this rifle has ever done that. I ran three different magazines through the AR, along with five different types of ammo in .223 and 556 (I settled on a .223 Wylde barrel allowing the use of both .223 and 556 ammo)…the rifle performed flawlessly.
I slow fired the rifle and rapid fired it as well, all went smoothly.
No jams, no stove piping, no issues of any sort.
I then started shooting for accuracy as was beyond impressed with the preliminary groupings of this set up. Despite the early issues, I am very happy with the build and the results.
CBC Inc. is an awesome company and handled my problems quickly and efficiently. If I ever decide to build another rifle, I'll be buying from them.
Thanks to all who offered advice on this problem and a big hats off to all that pinpointed the problem (under gassed) quickly.
I'll post up a photo of the beast later today.
My shooting buddy
I just got a 10.5 pistol kit from them in .223 and it’s also undergassed. Gas block appears to be properly aligned but the carbine spring they sent me is 2” longer than the other ones I have and is noticeably stiffer, thinking it might be that.