Quoted: This has probably been covered ad nauseum on other threads, so please feel free to pass on a link.
I'm in the planning stages of a RECCE build, and I'm considering options for the stripped lower. Being a newb, I'd like to know the limitations/advantages of the various receivers (i.e., Brand "S" doesn't work with a Magpul stock...). Let's ignore rollmarks and brand loyalties for the purposes of this discussion and focus on physical and finish differences.
Many thanks in advance for your feedback!
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Yes it has been but here's the readers digest version...
All of the current forged lowers will work just fine. The only functional differences are these...
Some will accept a RDIAS, some don't. 99% of us will never have ~$10K to buy one so what difference does it make.
Current Colt lowers use a different size FCG pins. (.170, normal is .155). Almost every parts house and aftermarket trigger have a .170 pin option so again, what difference does it make?
Some lowers have a Teflon finish which won't take most common finishes (if you wanted to camo it). If you are planning on painting it, what difference does it make?
In short... get whatever forged lower you want based off of whatever criteria floats your boat (price, brand, roll mark, etc)