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Colt LE6921/M4LE lower and rLL
I have a relatively new Colt LE6921 SBR where the receiver is not marked 6921 but rather marked "M4LE", and it came with a full auto M16 BCG, but not M16 fire/trigger control parts. I'm planning on getting a rLL and a KNS protector and some for of select fire kit to go along with it. For my upper's rLL compatibility I'm planning on going with the DPMS bolt carrier route since there are many reports of that working so well. But for lower compatibility I am wondering after reading the quarterbore article how much work it will take to get my particular lower to click with the rLL.
Can anyone comment on how well my lower will work
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