Thank you for posting that. I figured that would protrude a little bit. Worst case scenario, I could lightly grind those corners off and then de-burr them if the wife REALLY hates it. But, honestly, she’s going to be wearing her mechanix gloves for anything but an HD scenario anyway.
Does the lip on the bottom act adequately as a handstop to prevent contact with the cap? Is it really as skinny as the online reviews have said? How do you like them?
Impressions please. 
I’m going to make the call now… There will be a KMR on your wife’s rifle in 6 months or less. 
Not with a perm’d muzzle device. But, otherwise, you’d be correct.
Couldn’t you just trim the corners of triangle cap a little so the SL handguards would fit?
From the geometry at the front, the top half would sit too low unless I altered the fitment ring there as well. The bottom half is what interfaces with the corners of the handguard bottom piece. If you can picture a circle perfectly superimposed over an equilateral triangle, that’s the issue. I can seat either the top half or the bottom half inside the triangle cap. Just not both.
Skinny? ANOREXIC is the word. The heat shield inside had to bitch slap the handguard to snap on. Scuffed the barrel some. Like to have never got the top snapped into the delta ring. Here are a couple of pics.
I will take more pics to show some answers to your ??'s
I have big hands, short fingers. Have not shot it yet to feel heat, but I like it as well, feel wise as my KMR. Look at the delta ring and the handguard. Compare diameters.
Here are some different shots of the handguard.
It is 5.75" circumference in the middle and 6" at the delta ring.
Look how close the gas tube is to the inside.
The hand stop is more like a speed bump than a curb stop. Slide right over it.
Thanks brother. I actually really like how that looks. Minimalist. I think the wife will love it.
Cmon magpul… This was going on my next budget build… But they made a choice so now it’s not
I’m REALLY digging the B5 handguards. They are perfect for my wife’s little hands.
BCM 3" black polymer keymod section and an insight WML momentary only.
It is slim and tight isn’t it? Which MD are you stuck with? How loud is it, side blast, shooter blast/concussion?
It’s REALLY tight and quite slim, indeed. It’s the PWS FSC556. For the shooter, it’s not bad as far as blast.
The gun shoots FLAT with as little recoil as the last KAC SR15 i shot with .223 pressure ammo. The wife loves it for how controllable it is.
How do you attach stuff at 6:00? That handguard looks perfect for a KAG or stubby.
And I’ll second the FSC-556’s performance. I find it a bit nasally as the shooter, but it does keep the gun stupid flat, and keeps flash surprisingly low too (on a 16", anyway), considering it leans more towards a comp than a hider.
As far as i can tell, the 6 o’clock and 12 o’clock holes area just vent holes. Unless B5 releases some kit for those holes, you’d have to fashion your own mount or alter an existing one.
The FSC556 is the very first hybrid device that actually lived up to the claims they made. I’m certainly happy i chose that instead of a BC. This upper is almost 5 years old now. If i were doing it again today, I’d go with an EFAB or an AFAB 5.56.
I’m sure you could rig something up pretty easy.
But yeah, you essentially sold me on the EFAB in the PA thread (still haven’t gotten around to buying one, but it’s on the short list). The FSC is a great device, and if the BCM Mod 0 wasn’t so completely adequate, I’d swap it out, but I figure I’ll just hang on til I get an EFAB. I have the FSC-47 on an AK as well, and it just blows everything else out of the water when it comes to a good practical device.
It shouldn’t be too difficult to rig something up. It appears that Magpul MOE first gen backing plates will fit inside on the bottom, but the hole is on a radius.
Wife’s BCM 14.5" middy with MOE SL stock, Vltor A5H4 buffer, primary arms micro dot, PWS FSC556, and inforce WML momentary only.
Weighs in at 7.07 pounds sans mag.
My Handy Rifle with a Faxon Gunner 18" rifle gas barrel, SLR Ti Sentry 6 set screw AGB, gen 2 mbus, BCM KAG, IWC QD keymod sling mount, Aimpoint T1 in a Larue LT660, various V7 Weapons parts, a Magpul MOE SL, Surefire P2X 200 lumen light in a BCM gunfighter 1" ring keymod light mount, PA EFAB, and a Vltor A5H4 buffer.
6.93 pounds sans mag.
Both his and hers look like great setups. Funny thing, I weighed my bone stock M&P Sport (well, with a LaRue rear sight) awhile back, and it’s actually about a half-ounce heavier than the BCM with just the irons. I still like a simple drop-in setup, but they’ve become quite dated with such lightweight free floats. Your wife’s gun does look super handy, though.
This rifle is essentially the same weight as yours, 6.94 pounds with a newly-acquired KAG and no magazine or sling. Makes me wish I’d gotten an ELW-F barrel, instead of the standard profile.
Nice boomstick!
Yeah, the ELW profile is the next big thing in AR barrels. I know other manufacturers have their own interpretation of a continuous taper profile (Faxon’s Gunner profile, Ballistic Advantage’s Hanson profile, et al), but the ELW with its small gas block journal and lack of a barrel shoulder behind the journal is the most efficient so far.
I sure do love my Gunner profile. Makes my 18" with rifle gas carry and handle like a 16" middy.
Thanks, bud. The entire general ELW concept just makes so much sense. Even the EMW. Just getting rid of the forward weight makes a noticeable difference. I’ve been telling myself I don’t need an ELW upper, but I’ll probably break soon. And I’m sure yours handles really well, just looking at how thin that profile is. And to come in lighter than most 16" rifles you’d find on any given range? That’s a heck of a thing. Plus, it’s hard to beat a rifle-length gas system for shear smoothness.