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Thread: Why not more FSB cut out rails?

  1. #21
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    A real FSB is the best for an iron.

    I have found that a FSB sticking up through the rail to always be in the way of something.

    I like to run my light at 12:00 and that FSB gets hot and there's no way to avoid it.

    Rails are about versatility. Fixed ain't versatile.

  2. #22
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    I have been looking for a midlength fsb cutout rail for a long time. Centurion looked good and for a time Fortis looked even better, but with the concerns over Fortis durability it is looking like Centurion or nothing (if you can find one).

    While I get that there may be a reduced market for this product, I find it hard to believe that it is "too niche" considering some of the edge case products currently for sale. Combined with the fact that some build entire guns just to try out new offerings tells me there is profit to be made.

  3. #23
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    Quote Originally Posted by Omen View Post
    I have been looking for a midlength fsb cutout rail for a long time. Centurion looked good and for a time Fortis looked even better, but with the concerns over Fortis durability it is looking like Centurion or nothing (if you can find one).

    While I get that there may be a reduced market for this product, I find it hard to believe that it is "too niche" considering some of the edge case products currently for sale. Combined with the fact that some build entire guns just to try out new offerings tells me there is profit to be made.
    I personally never cared for the FSB and have only low pro gas blocks with flip ups. Until I just purchased a 12.5 in BCM kino upper last week. I had no idea this even an option.. I found a stickman photo of a 12.5 kino with C4 cutout and was sold. Couldnt find a c4 except for a ugly painted one on blade forum and I picked it up for cheap. Just stripped paint and now its GTG. For this application, I think it looks excellent. Really only this 12.5 kino with midlength FSB. Maybe the 14.5 mid with this C4 rail. Maybe Im bias to liking longer rails, or at least ones that get close to the muzzle device. If you wanted to run a x300 or something 12o'clock on a longer cut out rail on longer barrel, I think that makes sense. Otherwise, I dont really see a lot of demand IMO. Also, this upper is only being run with irons, and is the only one I have with iron only set up. So the FSB and fixed rear is the way to go IMO. But if the FSB/irons are not the primary sight, I see no real benefit of having it in the way. Lighter and out of the way flip ups are my choice. As they are really only a back up..

    Attachment 27909
    Last edited by Jwknutson17; 08-11-14 at 12:03.

  4. #24
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    I think a lot of it has to do with the current market. People that want a basic rifle buy one. People that want a long free float tube/keymod/etc, can now find them pre-assembled on a upper.



    Then there is a lot of people that don't over think it and just make do with what they have. On one of my rifles I run a light at 3:00 (on a 7" Omega rail) without issue. Yes it cast shadow to the left of the rifle but as a right handed shooter it throw the shadow to my weak side. Also it feels very natural to activate the light with my index finger of my support hand. It also has no issues (at least in my case) in a HD situation because if I need to go to gather family I'm only making left hand turns in the house, so clearing the corner with the light isn't an issue.

    Don't get me wrong a 12:00 light is ideal, but when I got a good deal on the Omega rail I jumped on it. And it is a very simple set up especialy for my use on a secondary rifle


    *Edit* Now that I think about it, I just don't think your "average" person understands the benefits of a rail in front of the FSB.
    Last edited by Fly8791; 08-11-14 at 11:39.

  5. #25
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    Cause all you in vogue Operaters say you must have a slick (IE no FSB) AR! MY FSB doen't bother me with my Optics I only have one AR that doesn't have an FSB. And the one's that have FSB's don't have rails either!
    Last edited by GunnutAF; 08-11-14 at 11:47.

  6. #26
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    Quote Originally Posted by GunnutAF View Post
    Cause all you in vogue Operaters say you must have a slick (IE no FSB) AR! MY FSB doen't bother me with my Optics I only have one AR that doesn't have an FSB. And the one's that have FSB's don't have rails either!
    Truth. I run a PEQ, light, and RDS. Have never had an issue with the FSB. Give me an FSB all day long.
    Last edited by 6933; 08-11-14 at 12:47. Reason: spellin'

  7. #27
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    Does anyone Know if DD has plans to do the Lite Rail III in FSB cut-out versions? A 12.0 mid-length FSB and a 9" carbine FSB for use on SBRs would get my money right away.

    I prefer a FSB, especially with red dots and have no problem using them with ACOGs and low-power variables. For longer range set-ups or exceptionally lightweight builds I don't mind flip-ups.

  8. #28
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    Since the advent of the T-1 Micro, I deemed fixed BUIS obsolete.

    I've seen more irons fail than T-1s, big Aimpoints, or ACOGs. It took me years to finally realize that a BUIS will come loose, bend, or break before an Aimpoint in a good mount. That's just how it is.

    In those years it took me to realize that, my vision slipped and irons are not quite as useful for me anymore.

    I ditched all my fixed irons and now have KAC flips with a T-1 Micro in a DD mount. An X300U at 12:00 in front of a folded KAC front is the best setup I've found as far as absolute durability and ergos go. There is NO disadvantage to running a light at 12:00 if you can.

    Last edited by samuse; 08-11-14 at 14:29.

  9. #29
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    I hear ya... I also prefer a fixed, pinned FSB for anything that might conceivably be used with irons, especially for co-witness setups... but I find that if it has at least a mid-length gas system, a gas-system-length FF handguard gives you plenty of room if you set it up right. I have both an A4 20" and a 16" pencil middy set up this way with Aimpoints and KAC flip up rear sights. I have a 200m zero on the dot and use it for everything up close; for anything past 300 or so I flip up the KAC rear, click it to the range, and send it with the irons right through the tube of the Aimpoint. It works well. With the FF handguard, there is no POI change with the irons whether I'm shooting offhand, with a solid rest, monopodded, sling-supported, off a bipod, or any other way unless you rest it on the barrel. It makes hits out to 500+ a breeze.

    Last edited by henschman; 08-11-14 at 15:23.
    "This motto may adorn their tombs
    (Let tyrants come and view):
    We rather seek these silent rooms
    Than live as slaves to you."

    Lemuel Haynes, 1775

  10. #30
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    Quote Originally Posted by samuse View Post
    Since the advent of the T-1 Micro, I deemed fixed BUIS obsolete.

    I've seen more irons fail than T-1s, big Aimpoints, or ACOGs. It took me years to finally realize that a BUIS will come loose, bend, or break before an Aimpoint in a good mount. That's just how it is.

    In those years it took me to realize that, my vision slipped and irons are not quite as useful for me anymore.

    I ditched all my fixed irons and now have KAC flips with a T-1 Micro in a DD mount. An X300U at 12:00 in front of a folded KAC front is the best setup I've found as far as absolute durability and ergos go. There is NO disadvantage to running a light at 12:00 if you can.

    Some sound advice here.

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