Mind if I ask why you want a carbine length gas system? I have both carbine and mid-length 16" barrels and I much prefer the mid-length systems....
Turns out it was firing pin. Replaced it and was good to go.
I recently assembled a new AR15. On the first range trip i had a failure to fire. I could not get any rounds to fire through the gun. I could load...
I love my WML also.
I have the HSP version in a thorntail mount on my go to AR, it is a solid light.
I like their APL too.
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