The best laid plans…

of mice and menMy AR-15 rebuild is temporarily SNAFU. I got my Daniel Defense MFR rail and I really like it (kind of wish I’d gotten the 13.5″ instead of the 10″ though). Like I’d hoped, the barrel nut is the same as the RIS-II. Good so far – no need to remove the gas block. Well, except… oops. When I thought I might have to take it off, I went to DD’s site to find out what kind of Loctite it uses for the screws. Major problem It won’t work with my gas block, which is also from Daniel Defense:

“* Does not fit within the MFR XS”

In my defense, I bought the gas block before the MFR rail was on the market. It’s pretty low profile so I had no reason to think it wouldn’t fit. No problem, I’ll just get a different gas block. I’m sure their Mk12 gas block will work, right? Wrong. OK, I’ll get a new rail. Geissele and LaRue both make quality stuff, they probably have a rail. Nope, at least not one as nice (or light) as the Daniel Defense MFR. So back to looking for a new gas block. Contacted Daniel Defense and they recommended one from SLR Rifleworks. It has two set screws and can also be pinned to the barrel. I’m not a big fan of set screw gas blocks. I don’t feel they’re as secure as the clamp-on style. Also, for this gun I don’t want to drill the barrel for a pinned block. So I guess I’ll order the gas block and dimpling tool and go from there. Not my first choice but it is what it is…

Maybe a new rail?

I did notice on DD’s web site that they have an XL version of the MFR rail that’s just a little fatter than the regular MFR. Maybe it is fat enough to work with the DD gas block? If so it will be tempting, but I already have too much money in this gun and I don’t want to drop another $279 for another rail. Besides, what would I do with my existing MFR? Sell it for a loss? I guess I could use it on an upcoming pistol build if the length is OK. Ah, the joys and frustrations of black rifle disease…

Peace out,

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