Q: Why BCM chose the 11.5" SBR over the 10.5" (Page 2 of 2)
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Originally Posted By Pacs:
Originally Posted By Lancelot:
The new SBR with stock options. With CTR http://farm6.static.flickr.com/5255/5500215370_bf84bc4704_z.jpg http://farm6.static.flickr.com/5255/5500215370_bf84bc4704_z.jpg With EMOD http://farm6.static.flickr.com/5259/5500215922_9fbf290d8f_z.jpg http://farm6.static.flickr.com/5259/5500215922_9fbf290d8f_z.jpg . Looks nice. |
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Originally Posted By Lancelot:
Here are some pictures I took today. This is my BCM SBR, with generation 2 MOE handguards, the Mount-N-Slot QD swivel, handstop and scout light mount. http://farm6.static.flickr.com/5234/5868179744_5b29d5dab0_z.jpg http://farm4.static.flickr.com/3124/5867619405_7c186d1af8_z.jpg http://farm6.static.flickr.com/5263/5867622703_6157a70050_z.jpg http://farm7.static.flickr.com/6027/5867618357_672779114a_z.jpg Nice, I just like a larger stock. 
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Originally Posted By Pacs:
Originally Posted By Lancelot:
Here are some pictures I took today. This is my BCM SBR, with generation 2 MOE handguards, the Mount-N-Slot QD swivel, handstop and scout light mount. http://farm6.static.flickr.com/5234/5868179744_5b29d5dab0_z.jpg http://farm4.static.flickr.com/3124/5867619405_7c186d1af8_z.jpg http://farm6.static.flickr.com/5263/5867622703_6157a70050_z.jpg http://farm7.static.flickr.com/6027/5867618357_672779114a_z.jpg Nice, I just like a larger stock. I have run and EMOD on there occasionally. |
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Originally Posted By Lancelot:
Here are some pictures I took today. This is my BCM SBR, with generation 2 MOE handguards, the Mount-N-Slot QD swivel, handstop and scout light mount. http://farm6.static.flickr.com/5234/5868179744_5b29d5dab0_z.jpg http://farm4.static.flickr.com/3124/5867619405_7c186d1af8_z.jpg http://farm6.static.flickr.com/5263/5867622703_6157a70050_z.jpg http://farm7.static.flickr.com/6027/5867618357_672779114a_z.jpg I just sold my 14.5" Midlength upper that was identical to this in order to build exactly what you have. I figured the 3" less barrel length would make the suppressor easier to handle. That looks really nice, the only difference is mine has a 6PL instead of a scout light. I cant wait for my stamp to come back. |
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Originally Posted By HonorStudent:
Originally Posted By Lancelot:
Here are some pictures I took today. This is my BCM SBR, with generation 2 MOE handguards, the Mount-N-Slot QD swivel, handstop and scout light mount. http://farm6.static.flickr.com/5234/5868179744_5b29d5dab0_z.jpg http://farm4.static.flickr.com/3124/5867619405_7c186d1af8_z.jpg http://farm6.static.flickr.com/5263/5867622703_6157a70050_z.jpg http://farm7.static.flickr.com/6027/5867618357_672779114a_z.jpg I just sold my 14.5" Midlength upper that was identical to this in order to build exactly what you have. I figured the 3" less barrel length would make the suppressor easier to handle. That looks really nice, the only difference is mine has a 6PL instead of a scout light. I cant wait for my stamp to come back. That same light mount has a provision to take a ring so you can run a round body flashlight on it. |
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Originally Posted By HonorStudent:
Originally Posted By Lancelot:
Here are some pictures I took today. This is my BCM SBR, with generation 2 MOE handguards, the Mount-N-Slot QD swivel, handstop and scout light mount. http://farm6.static.flickr.com/5234/5868179744_5b29d5dab0_z.jpg http://farm4.static.flickr.com/3124/5867619405_7c186d1af8_z.jpg http://farm6.static.flickr.com/5263/5867622703_6157a70050_z.jpg http://farm7.static.flickr.com/6027/5867618357_672779114a_z.jpg I just sold my 14.5" Midlength upper that was identical to this in order to build exactly what you have. I figured the 3" less barrel length would make the suppressor easier to handle. That looks really nice, the only difference is mine has a 6PL instead of a scout light. I cant wait for my stamp to come back. 11.5" w/ a can is pretty nice IMO. 
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God Bless Texas
"... it's the socialism, stupid." - RL
"... it's the socialism, stupid." - RL
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Originally Posted By Freakinout:
The scout light is definitely a great light, much better than 1" lights (also IMO) http://www.poteau-oil.com/photography/firearm2011/sbr0611-02.jpg I'm now convinced I need an LT Scout Light Mount, thanks jerk.
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"At that time [1909] the chief engineer was almost always the chief test pilot as well. That had the fortunate result of eliminating poor engineering early in aviation." —Igor Sikorsky
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Originally Posted By Cole2534:
Originally Posted By Freakinout:
The scout light is definitely a great light, much better than 1" lights (also IMO) http://www.poteau-oil.com/photography/firearm2011/sbr0611-02.jpg I'm now convinced I need an LT Scout Light Mount, thanks jerk.
Its just money. And a LT mount will make it well spent money. |
God Bless Texas
"... it's the socialism, stupid." - RL
"... it's the socialism, stupid." - RL
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Just got my approved NFA stamp back recently... just did this as a KISS rifle.
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Any chance you have a picture of this set up without the rail covers? Maybe a pic of a 11.5" upper with a DD Omega X 7? Thanks in advance! |
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Are you liking the light on the right better? |
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Originally Posted By kap_x:
Not sure if 12.5 will give much benefit over 11.5 in regards to dwell time. There's no marking on the graph, or dedicated line for 12.5" in the table, but you can kinda rough your own http://ar15barrels.com/tech/pressure-time.gif Originally Posted By kap_x:
Originally Posted By Croft32:
Originally Posted By Mopseydocks6014:
What advantages would the 12.5 have over the 11.5 if any?? More dwell time (not sure how significant it is in regard to reliability), ability to mount certain cans that wont fit on the 11.5", more velocity to shoot a little further, and, of course....more weight! Not sure if 12.5 will give much benefit over 11.5 in regards to dwell time. There's no marking on the graph, or dedicated line for 12.5" in the table, but you can kinda rough your own http://ar15barrels.com/tech/pressure-time.gif Shouldn't this chart equate to a 40% increase in dwell time? It looks to from .090 to .120 for time after passing the gas port which would produce the biggest change |
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Originally Posted By Laust:
No disrespect Grim, it was probably just a typo but its FSC556, tommy might be lookin for one. No its actually a KAC556, a shortened version of the FSC556. link 
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Originally Posted By Buckshot556:
So BCM, in your opinion, what are the pros and cons when comparing your 12.5" vs 11.5" uppers? I'd like to know this too, however it's water under the bridge for me. I took advantage of the free BCG and $1 gunfighter deal a couple of weeks ago and picked up a BCM 12.5 (not Kino) My reasoning was, while I currently run a 7.62 suppressor, I want a dedicated 5.56 suppressor on the SBR and I'm leaning heavily towards an Ops-inc can which needs the extra inch. |
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Originally Posted By guns_up: BCM 11.5 Lightweight upper with KMR... cant go wrong.. http://i292.photobucket.com/albums/mm10/natesyz250/Mobile%20Uploads/2015-04/adcb9913-f11d-445c-b7d5-16c92aab7ba0_zpsloulb4me.jpg  |
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Originally Posted By MARK4A3:
BCM: why not give the customers what they want? A 10.5 or 10.3" barrel. I am running an 11.5 chopped to 10.3 and have yet run into any reliability issues. Seek and you shall find. |
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Originally Posted By sheltot:
Originally Posted By MARK4A3:
BCM: why not give the customers what they want? A 10.5 or 10.3" barrel. I am running an 11.5 chopped to 10.3 and have yet run into any reliability issues. Seek and you shall find. Those aren't BCM made though. |
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Originally Posted By M4Tank:
Those aren't BCM made though. Originally Posted By M4Tank:
Originally Posted By sheltot:
Originally Posted By MARK4A3:
BCM: why not give the customers what they want? A 10.5 or 10.3" barrel. I am running an 11.5 chopped to 10.3 and have yet run into any reliability issues. Seek and you shall find. Those aren't BCM made though. Indeed. If you read the first post, their reasoning is explained. But they are doing what you want by offering 10.5" barrel lengths by manufacturers of good reputation. If you must have a BCM, order an 11.5" and have it cut down and threaded.
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I've been in anguish over this decision between 10.5 & 11.5 for a while now...I'm buying my first SBR, and feel like if I paid the money for a stamp, I want it as short as I can that still is reliable...and that is 10.5". However, the BCM 11.5 just keeps smiling at me!
Can someone who has an 11.5 & 10.5 tell me if there is any appreciable difference they notice when navigating the rifle in close quarters? Can you tell that the extra inch is there? I know it probably sounds stupid, but I feel like I'd notice it. Also, those that have an 11.5 with suppressor...does that extra inch become more noticeable in this case? Thanks |
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Originally Posted By smitty_007:
I've been in anguish over this decision between 10.5 & 11.5 for a while now...I'm buying my first SBR, and feel like if I paid the money for a stamp, I want it as short as I can that still is reliable...and that is 10.5". However, the BCM 11.5 just keeps smiling at me! Can someone who has an 11.5 & 10.5 tell me if there is any appreciable difference they notice when navigating the rifle in close quarters? Can you tell that the extra inch is there? I know it probably sounds stupid, but I feel like I'd notice it. Also, those that have an 11.5 with suppressor...does that extra inch become more noticeable in this case? Thanks I've got. BCM 11.5" with silencer as my house gun. I've started T&E on a 10.3". With weight of the can out there, the inch isn't really noticeable. |
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Originally Posted By sanetzu: This is great info on the 11:5 and dwell time. What about 12.5. I am told that you have better terminal velocity with 12.5. Does it really make a difference. and if so at what distance do you see the difference. Good question, I recently got rid of my 733 upper and now have a SBR lower needing another upper. I’ve sold my 10.3’s as well I kept my 11.5 and 2, 14.5” uppers on SBR lowers, I know the 10.3” works, but let’s face it that extra inch is nice, plus I’m not busting doors down, or trying to maneuver in ships so there is no reason for a 10.3 in my collection as I use the shit out of my rifled, I’ve even considered another 14.5 as where I’m at in rural Washington the longer barrel is more than worth it. I’m looking at either a 12.5 if it’s that much better, or a 16” middy. |
How much crack did you have to smoke to reach that conclusion, a $20 rock or Whitney Houston level shit?
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