TROUBLE WITH BCG IN NEW BLACKTHORNE UPPER

[bluegrey8]

I bought a Blackthorn 20" 308 upper for my DPMS. Put my BCG in and installed on my DPMS lower. Bolt seats fine. Fired a round and bolt didnt eject and the BCG wouldnt pull back. Had to strike but on ground to eject catridge. Bolt works fine until you load a round and fire. Then it is hell to get it out. Headspace?? What can someone tell me?

[98Z5V]

You're going to end up with all kinds of problems with that Blackthorne upper.  I hate to say it, but it's true. 

You'll have to find a good gunsmith, that's very familiar with the AR platforms, and see if he can help you.  There will probably be multiple issues with that upper.

Not trying to blow you off, but here's some information about that company:

https://www.google.com/search?hl=en&site=&source=hp&q=vulcan+hesse+blackthorne&oq=Vulvan+Hesse+&gs_l=hp.1.1.0i13i30l7j0i8i13i30l2.2576.7168.0.10292.13.13.0.0.0.0.388.1659.9j2j1j1.13.0.les%3B..0.0...1c.dHoSIEsGZfM

[MikedaddyH]

Tight Chamber !

This is a new upper ?

How many rounds have been shot through it ?

Did you headspace the bolt to the chamber ?

I don't want to suggest a slight polish of your chamber yet but it may need to be done.

Please give us more info . Like ammo used. Was the BCG oiled. And anything else to help. The more info the better.

[MikedaddyH]

RULE 13: YOU GET WHAT YOU PAID FOR ! :'(

I really hate to put this out there but. Cheaply made parts by  low bidding companies some of them are made in Asia. Loose torarances on machining doesn't help.

[Jgun]

Could be tight chamber as mentioned above, but might also be short headspace, Since you say you are using a bolt carrier that you already had, I'm assuming that it was not matched to that barrel extension. How do you know that the headspace is OK? I'd have that checked before firing the gun again.

[MaDuce]

Blackthorne uppers have been known to blow up in people's faces, and the company is reported to give the victims the finger when they do.

If you want cheap, go with Red X. Though admittedly I never used it, I have a Red X upper and can't find anything particularly wrong with it. Also, all the other Red X owners I've come across seam to love them.

After everything, Red X isn't much cheaper then a DPMS oracle, but the features are a little fancier and if your funds are very limited, you can get the upper without the BCG.