First off this rating has no reflection on Wing Tactical, item was shipped safely and promptly and by the time I determined this bolt carrier was out of spec their 30 day return window had passed.
Bought this as the final piece for my wife's 5.5lb build and upon installing and cycling a few rounds I initially thought I had too low a setting on adjustable gas block.
Even after backing gas screw out fully I was having the same issues of the bolt not fully locking into battery, almost every time.
I put gun aside for a few weeks and had time to think.
When I got back to dealing with this I brought 3 other rifles with 223 BCGs to the bench.
As I was switching components between guns and test firing, the problem component was obvious, the Velocity bolt carrier.
It is out of spec in that it is either too thick because of the coating(which is already wearing off in the areas where it contacts the upper after only 50 rounds) or the grooves milled for magazine lip clearance are too shallow (wear marks there also)
It is even difficult to fully lock loaded magazine into place with this bolt carrier in battery, in all 4 rifles.
All my magazines exhibit this condition with this bolt in 3 different rifles and none of them do with the 3 other bolts.
So I sent an e-mail to Velocity Triggers customer service WITHOUT A REPLY.
There you have it, take my experience for what it is worth and buy something else, I will not purchase any item from them.
I will have to have a machinist friend correct the milled grooves clearance.