As mentioned elsewhere, got a Brownells 601 Retro, lightly used, at a local gunshow. Put it on my 16A1 lower; nice fit, nicely made. It is the 16" carbine; using an LMT BCG.
One problem; it won't run. Took it to get a quick zero; empties eject, but the bolt isn't picking up the next round from the magazine.
This sounds like the classic 'undergassed' issue that the original 601 carbines had (not enough dwell time beyond the gas port).
Anybody else experience these issues? Suggestions?
The vendor I bought it from had it on consignment for a buddy; he's to check with him (tho' I'm suspicious of a straight answer).
Thanks,
Moon
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