From reading the blackthorne crap seems to be a lot of hearsay like most internet garble. But I took the upper back off and put some oil on the parts and it seems like the bolt is sliding a lot better. It didn't look like whoever put the upper together used any lube.
The lower is a Smith and Wesson M&P15 from a local gunshop. The rest was purchased recently at a gun show in town. It was a blackthorne kit, minus the lower. I don't have specific's on any of the parts in that kit but it is the 16" a2 upper with the m4 style stock.
Even though the bolt is moving better and its feeding more of the rounds now, its still not 100%. I have just been feeding them by hand since I didn't have time to go shoot today... But anyway, I would say about half the time it looks like its feeding great and the other half it looks like the bolt stops a few mm out from where it should be. And if I hit the assister it doesn't push the bolt in anymore. It seems to only get stuck like that if the slide isn't pulled back ALL the way to cock it.
The lower is a Smith and Wesson M&P15 from a local gunshop. The rest was purchased recently at a gun show in town. It was a blackthorne kit, minus the lower. I don't have specific's on any of the parts in that kit but it is the 16" a2 upper with the m4 style stock.
Even though the bolt is moving better and its feeding more of the rounds now, its still not 100%. I have just been feeding them by hand since I didn't have time to go shoot today... But anyway, I would say about half the time it looks like its feeding great and the other half it looks like the bolt stops a few mm out from where it should be. And if I hit the assister it doesn't push the bolt in anymore. It seems to only get stuck like that if the slide isn't pulled back ALL the way to cock it.
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