
Originally Posted by
Xrob
Springs are the same length.
I bought a new BCG for the windham/spikes build, it is an auto, like my original.
Put the original bcg back in the Windham upper and see if it runs. If it does you've isolated the issue down to the new bcg. Check the key for movement, ensure screws are tight/staked. Check key for obstructions. Ensure rings on the new BCG are sealing properly (put bolt in forward/unlocked position and stand the carrier on the head of the bolt. If the weight of the carrier is enough to compress the bolt, you need new rings).
Semper Paratus Certified AR15 Armorer
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