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Thread: New BCM rail

  1. #2081
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    When I look at this ELW, it's really about a Gov profile behind the gas block, and forward of the gas block is where it's thinnest. As far as handling, I put it on a lower with a SOPMOD stock and it didn't feel tail heavy at all.
    "You people have too much time on your hands." - scottryan

  2. #2082
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    Thanks Mark, thats exactly what I was hoping to hear and I look forward to reading about and performing more accuracy and POI tests with these new barrels. This type of barrel design seems to be very logical so with any luck maybe BCM will put out their version of an "Enhanced Government" barrel, I can only assume the market will have more and more offerings like this going forward.

  3. #2083
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    While I wait to take pictures for an intro tread I thought I would chime in with my experience using this rail.

    My complete rifle weighs exactly 7.0 lbs unloaded with a sling using a bathroom scale that measures up to .1 of a pound. It may seem as though I have a lot of crap on my weapon by first glance of the parts list but if you read further I have listed everything that would be relevant to changing the weight, which is everything primarily used. It's pretty much a bare rifle with a sling, iron sights, flash light, and MRDS optic.

    The following are the relevant parts used: Stag blem lower, ALG ACT FCG (using the KNS pins and not the plated ones that came supplied), KNS 2nd gen anti walk pins, PSA LPK w/MOE pistol grip, Blackhawk/knoxx stock, milspec carbine buffer tube kit, Phase 5 BAD Lever, BCM complete upper (16" Middy LW CHF, A2 FH, KMR13, BCM BCG, BCM Mod 4 CH), Insight MRDS w/KZ mount, Magpul Pro F/R sights, Insight M6X flashlight/laser rifle kit (standard USGI pressure switch), Magpul standard attachment MS3 sling, Keymod QD rail mount (the one BCM sells), MI buffer tube sling mount (slide on type), (x2) BCM aluminum short rail sections, and two zip ties. I have a Harris Bipod but it isn't used on the rifle except for confirming zero.

    This is if pretty great considering the standard Colt weights. Although, I'm not sure if these weights include a magazine and sights.

    "Colt 6920 - 6.95 lbs
    Colt 6921 - 6.8 lbs
    Colt M4 - 6.8lbs
    Colt Commando - 6.21 lbs
    Colt 6721 - 7.3 lbs"

    Originally posted by variablebinary (https://www.m4carbine.net/showthread...carbines-weigh)

    The rail feels great in hand, using the C-clamp extended arm front grip method. I tried using a Magpul AFG and a USGI vert. grip but I found that the rail is VERY comfortable just by itself. The problem for those who use this style of grip is that your hand ends up almost right where the gas block is on a mid-length gas system like mine. After zeroing the rifle's sights I fired 2 full magazines of Tula .223 in rapid succession with my hand at the fore mentioned location near the gas block and although the barrel was burning off the factory oil, my hand was just a little warm. I was wearing the standard black Mechanix gloves because it's a habit for me to wear gloves when I shoot. I will be purchasing the BCM covers for the gas block areas when they become available for future use in training.

    As mentioned in one excellent Youtube video review, I believe it was "Twangandbang", the finish on the KMR rail is different than the standard anodizing/bluing of similar rails. It has a bit of texture to it I find (YMMV). I think BCM used this new coating because of the different metals used in the rail, correct me if I'm mistaken. We both conclude that this finish is cool but not extremely durable. The rail is susceptible to Knicks and scratches from adding and removing accessories from the top rail. I found that when Adding and removing the BCM keymod rails the finished was unharmed, but the same could not be said for the 3rd party Keymod QD mount they sell. When testing out different front mount locations I managed to kick up the keymod holes pretty good. This may have been due to over tightening on my part as I do not use a torque gauge for trivial things like that. This matters little to me as I view it as a tool and nothing more. I thought I would mention it regardless for those who would find this important. It should also be mentioned that you can mount a rail section to the 11 and 1 O'clock positions but you not be able to add accessories to that rail. There is simply no room.


    In summary; I would absolutely buy this rail if you have the need for a long rail for the AR15. If you already have a similar tubular rail I personally wouldn't recommend buying this one to replace it. IMO there is little gained for the money and you could better utilize your funds on ammo and training. If you haven't purchased a rail yet or you are looking to replace your quad rail design hand guard I would say that this would be worth your while.

    -Aldo
    Last edited by aldotheapache; 03-25-14 at 18:23.

  4. #2084
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    Quote Originally Posted by aldotheapache View Post
    While I wait to take pictures for an intro tread I thought I would chime in with my experience using this rail.

    My complete rifle weighs exactly 7.0 lbs unloaded with a sling using a bathroom scale that measures up to .1 of a pound. It may seem as though I have a lot of crap on my weapon by first glance of the parts list but if you read further I have listed everything that would be relevant to changing the weight, which is everything primarily used. It's pretty much a bare rifle with a sling, iron sights, flash light, and MRDS optic.

    The following are the relevant parts used: Stag blem lower, ALG ACT FCG (using the KNS pins and not the plated ones that came supplied), KNS 2nd gen anti walk pins, PSA LPK w/MOE pistol grip, Blackhawk/knoxx stock, milspec carbine buffer tube kit, Phase 5 BAD Lever, BCM complete upper (16" Middy LW CHF, A2 FH, KMR13, BCM BCG, BCM Mod 4 CH), Insight MRDS w/KZ mount, Magpul Pro F/R sights, Insight M6X flashlight/laser rifle kit (standard USGI pressure switch), Magpul standard attachment MS3 sling, Keymod QD rail mount (the one BCM sells), MI buffer tube sling mount (slide on type), (x2) BCM aluminum short rail sections, and two zip ties. I have a Harris Bipod but it isn't used on the rifle except for confirming zero.

    This is if pretty great considering the standard Colt weights. Although, I'm not sure if these weights include a magazine and sights.

    "Colt 6920 - 6.95 lbs
    Colt 6921 - 6.8 lbs
    Colt M4 - 6.8lbs
    Colt Commando - 6.21 lbs
    Colt 6721 - 7.3 lbs"

    Originally posted by variablebinary (https://www.m4carbine.net/showthread...carbines-weigh)

    The rail feels great in hand, using the C-clamp extended arm front grip method. I tried using a Magpul AFG and a USGI vert. grip but I found that the rail is VERY comfortable just by itself. The problem for those who use this style of grip is that your hand ends up almost right where the gas block is on a mid-length gas system like mine. After zeroing the rifle's sights I fired 2 full magazines of Tula .223 in rapid succession with my hand at the fore mentioned location near the gas block and although the barrel was burning off the factory oil, my hand was just a little warm. I was wearing the standard black Mechanix gloves because it's a habit for me to wear gloves when I shoot. I will be purchasing the BCM covers for the gas block areas when they become available for future use in training.

    As mentioned in one excellent Youtube video review, I believe it was "Twangandbang", the finish on the KMR rail is different than the standard anodizing/bluing of similar rails. It has a bit of texture to it I find (YMMV). I think BCM used this new coating because of the different metals used in the rail, correct me if I'm mistaken. We both conclude that this finish is cool but not extremely durable. The rail is susceptible to Knicks and scratches from adding and removing accessories from the top rail. I found that when Adding and removing the BCM keymod rails the finished was unharmed, but the same could not be said for the 3rd party Keymod QD mount they sell. When testing out different front mount locations I managed to kick up the keymod holes pretty good. This may have been due to over tightening on my part as I do not use a torque gauge for trivial things like that. This matters little to me as I view it as a tool and nothing more. I thought I would mention it regardless for those who would find this important. It should also be mentioned that you can mount a rail section to the 11 and 1 O'clock positions but you not be able to add accessories to that rail. There is simply no room.


    In summary; I would absolutely buy this rail if you have the need for a long rail for the AR15. If you already have a similar tubular rail I personally wouldn't recommend buying this one to replace it. IMO there is little gained for the money and you could better utilize your funds on ammo and training. If you haven't purchased a rail yet or you are looking to replace your quad rail design hand guard I would say that this would be worth your while.

    -Aldo
    Welcome to M4C! Great first post.

  5. #2085
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    Quote Originally Posted by Txhorns View Post
    Thanks Mark, thats exactly what I was hoping to hear and I look forward to reading about and performing more accuracy and POI tests with these new barrels.
    We didn't get crap done last weekend. Had some guys roll through town and shoot with us. I still want to see how it shoots with mk262 pressure ammo... and then how it shoots with a hot barrel.
    "You people have too much time on your hands." - scottryan

  6. #2086
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    Quote Originally Posted by markm View Post
    We didn't get crap done last weekend. Had some guys roll through town and shoot with us. I still want to see how it shoots with mk262 pressure ammo... and then how it shoots with a hot barrel.
    I'm hoping to do the same this weekend, but not sure if I'm going to be able to get down to the farm yet.

  7. #2087
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    Does anyone here know if the Noveske keymod Scout light mount will work with a DBAL mounted at 12 o'clock?
    May God have mercy upon my enemies, because I won't.

  8. #2088
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    I don't know for sure but my guess is no way. The noveske holds the scout extremely close to the rail. You could run the mount at 2 o'clock or 3 o'clock with the light down.Ill post a pic of it mount when I get my upper next week.
    Last edited by rapomstage3; 03-25-14 at 19:06.
    "You get what you pay for"

  9. #2089
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    Quote Originally Posted by markm View Post
    We didn't get crap done last weekend. Had some guys roll through town and shoot with us.
    Shooting buddies.....who needs em?

  10. #2090
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    Some KMR porn.

    "You people have too much time on your hands." - scottryan

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