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8/19/2017 7:01:26 PM EDT
Got a 7.5" SBR, running a Troy pdw stock. With the bolt locked back, it releases way too easy. With minimal movement of the rifle, or slapping in a loaded mag. Ordered a new spring from Troy. Anyone had this problem?
8/19/2017 7:23:40 PM EDT
[#1]
Means your bolt face and/or bho are too slippery, or your buffer spring is too weak. The only thing keeping your bolt back is friction between the bho and the bolt face.
8/19/2017 7:25:21 PM EDT
[#2]
I'd guess something is restricting the movement of the bolt catch, not allowing sufficient engagement with the BCG.  The bore that the bolt catch plunger rides in may have a burr, or the channel the bolt catch lives in might have some flash.  I'd start by removing the bolt catch and investigating.
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