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Reply to "LaRue Tactical OBR Carbine Conversion"

You have a couple different options.

 

You can either go with an LR308 or AR-10 pattern buffer system. I'll outline the differences below:

 

LR308:

-AR-15 collapsible stock receiver extension.

-Short LR308 buffer.

-LR308 carbine action spring.

 

AR-10:

-AR-10 or VLTOR A5 collapsible stock receiver extension.

-AR-15 collapsible stock buffer.

-AR-10 action spring.

 

Unless you really need the shortest position/LOP on an AR-15 receiver extension, I'd go with the AR-10 pattern parts. The OBR rifles that come with collapsible stocks use AR-10 pattern buffer systems. For the CTR stock you'll want a 6-position receiver extension (standard AR-10 one from Armalite or VLTOR RE-10/A5SR), but if you go to a longer stock (such as ACS, STR, EMOD, ect.) you can use the more common 7-position receiver extension. For a buffer, I recommend starting with an H3 weight (or heaver if you'll be running suppressed).

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