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Post by rickoshea on Nov 13, 2016 18:49:45 GMT
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Post by dannusmaximus on Nov 13, 2016 21:30:43 GMT
Rick, we discussed doing exactly what you're describing. Here's a text from Arch, talking about that potential set-up, as well as his concerns:
"I think you would need to go with a YHM railed gas block because your bed is .625 instead of .750. The way the YHM attaches will not allow me to dimple your barrel, so we would be relying entirely on the clamping power to hold your handguard/sling in place. Heat induced barrel expansion and contraction will cause this to loosen. MI makes a triple screw, but it's $160, and it is still relying on clamping power alone. I wouldn't do it."
I've done a bit of research on pinning vs clamping vs. set screws, and pinning appears to be the gold standard. All my AR's are of the SHTF variety, so I want to err on the side of rock solid reliability, and I'm hesitant to go with this way, even though it seems like the easiest and cheapest way to work around the issue. Thoughts on that? Have you had any issues with clamped or screwed blocks?
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Post by dannusmaximus on Nov 13, 2016 21:33:31 GMT
Get a new barrel with a Lo-Pro gas block and go from there...free floated rail, ect. Just bite the bullet and get it done...preferably in .300BLK with an 8-9 inch barrel.  Oy. Why must you steer me towards the solution with the most coin involved?!?! A concern is actually finding the 5.56 barrel in 'dissy' configuration. The one's Arch can find he is not impressed with, at least those that don't require me taking out a home equity loan to get. Did I mention that I've so far been able to resist the siren's song of .300blk, mostly because I talked a good buddy of mine into building one instead so I can shoot it?  |
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Post by dannusmaximus on Nov 13, 2016 21:37:22 GMT
How far up is the vertical blur for you? I mean is it blocking any part of the BDC reticle? Or is it just a visual irritant barely making it into the scopes view at 6 o'clock? More a visual irritant, but it extends about 1/2 way into my field of view. Doesn't really block anything because it's just a vertical blur, but it is really distracting, especially if I'm trying to really focus on a target - - which is kind of the point of the magnified optic, such as it is. I'm leaning toward pulling the FSP and installing a free float handguard, and will check out the one you linked. |
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Post by omegaman on Nov 13, 2016 22:08:52 GMT
I much prefer free float setups. But, that is a nice rifle and I would have a hard time hacking off the fsp. I would just get use to the little "blur"...or just build a new rifle with a free float for your acog and rock an eotech on the dizzy, lol!
But seriously, having been issued an RCO equipped M16/M4 for the majority of my .mil time, it never was an issue nor do I recall complaints. I had the 4x Primary Arms prism scope on a carbine with standard fps and while if I thought about it, I would notice a blur, but in general it never bothered me. YMMV. Just build another free-floated rifle.
On the topic of free-floats, I have an MI, Troy, and BCM KMR. MI is great for the price. Troy is the easiest to mount and uses standard barrel nut...and rock solid. The BCM is damn nice and I'm a fan of the keymod...just pricey. The AlG looks tempting, but I would still choose MI if budget was a concern.
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Post by rickoshea on Nov 13, 2016 22:23:27 GMT
You can still drill & pin a clamp-on block....that's what I did to the clamp-on JP adjustable block I put on the AR 10 I just finished, and the clamp-on Venom block on one of my AKs.
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Post by Browning35 on Nov 14, 2016 3:33:40 GMT
How far up is the vertical blur for you? I mean is it blocking any part of the BDC reticle? Or is it just a visual irritant barely making it into the scopes view at 6 o'clock? More a visual irritant, but it extends about 1/2 way into my field of view. Doesn't really block anything because it's just a vertical blur, but it is really distracting, especially if I'm trying to really focus on a target - - which is kind of the point of the magnified optic, such as it is. I'm leaning toward pulling the FSP and installing a free float handguard, and will check out the one you linked. Well, if it's halfway up that might actually bug me enough to do something about. So gimme Number 3. Heres the link for Midwest. rkkcm.yujjz.servertrust.com/Default.asp |
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Post by as556 on Nov 14, 2016 13:12:20 GMT
You should just be able to pop the pins holding the FSB in, retain the original low profile gas block installed on barrel then install the rail relatively easy.
Shouldnt cost you more than $150 total unless I'm missing something obvious. UTG PRO, MI and ALG are where I'd be looking for rails.
There's also folding A2 FSB that you might be able to replace yours with.
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Post by LowKey on Nov 14, 2016 14:38:14 GMT
Get a new barrel with a Lo-Pro gas block and go from there...free floated rail, ect. Just bite the bullet and get it done...preferably in .300BLK with an 8-9 inch barrel. Oy. Why must you steer me towards the solution with the most coin involved?!?! Because it gives you the best results, long term. Because if you really want it you can spare the coin. And because I know you're going to end up doing it someday anyway, so may as well save you the wait and cash wasted on stop-gap measures.  Did I mention that I've so far been able to resist the siren's song of .300blk, mostly because I talked a good buddy of mine into building one instead so I can shoot it? Unless you're having your men tie you to the mast of your ladder truck you're eventually going to follow that seductive song right into owning a pistol upper in 300BLK. You cannot resist the power of the darkside. Search your feelings....you know this to be true. |
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