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[ARCHIVED THREAD] - BCM - need advice (Page 1 of 2)
Posted: 6/27/2013 12:29:10 PM EDT
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Going to get a new upper and have narrowed it down to two options:
1 - BCM 14.5 + Perm FH carbine 2 - BCM 16" LW Mid length I've owned both gas systems before and can't decide which one to get. Going to throw an AP pro on it and use it as my general all purpose upper to complement my 14.5+1.5 A1 R0723 clone upper. If I got the carbine, I'd make it an M4A1 clone with an RAS |
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16". I like to swap HG and try out different makes. With a 14.5" and permanent FH, that's not possible. Also like the extended sight length with a FF HG which reaches further than is possible with a 14.5" barrel. Problem solved for swapping hardguards |
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16". I like to swap HG and try out different makes. With a 14.5" and permanent FH, that's not possible. Also like the extended sight length with a FF HG which reaches further than is possible with a 14.5" barrel. Problem solved for swapping hardguards How does that solve having a pinned FH on a 14.5in barrel? You still can't get the gas block off to change barrel nuts. Edit: nevermind I looked it up on Google. Looks like an excellent solution to the biggest drawback to the 14.5 |
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Have you already decided on the rail and nut you will be using? 14.5 if you already know the rail you will use. If i go with the carbine, I'm going to pick up a drop in RAS. I won't be free floating this one. Well in that case get the 14.5 of course.. thats a no brainer |
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16". I like to swap HG and try out different makes. With a 14.5" and permanent FH, that's not possible. Also like the extended sight length with a FF HG which reaches further than is possible with a 14.5" barrel. Problem solved for swapping hardguards Am I missing something? It's an extended FH. If it's perm-attached, how do you change barrel nuts? |
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16". I like to swap HG and try out different makes. With a 14.5" and permanent FH, that's not possible. Also like the extended sight length with a FF HG which reaches further than is possible with a 14.5" barrel. Problem solved for swapping hardguards Am I missing something? It's an extended FH. If it's perm-attached, how do you change barrel nuts? I thought the same thing until I Googled it. It's a low profile design which allows the gas block or FSB to slide over t once pinned in place. Pretty slick! |
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16". I like to swap HG and try out different makes. With a 14.5" and permanent FH, that's not possible. Also like the extended sight length with a FF HG which reaches further than is possible with a 14.5" barrel. Problem solved for swapping hardguards Am I missing something? It's an extended FH. If it's perm-attached, how do you change barrel nuts? I thought the same thing until I Googled it. It's a low profile design which allows the gas block or FSB to slide over t once pinned in place. Pretty slick! Unless the FH is the same diameter as the barrel, I don't see that working. Judging by the pic, it doesn't appear possible. |
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16". I like to swap HG and try out different makes. With a 14.5" and permanent FH, that's not possible. Also like the extended sight length with a FF HG which reaches further than is possible with a 14.5" barrel. Problem solved for swapping hardguards Am I missing something? It's an extended FH. If it's perm-attached, how do you change barrel nuts? I thought the same thing until I Googled it. It's a low profile design which allows the gas block or FSB to slide over t once pinned in place. Pretty slick! Yup exactly it is the same diameter .750 as majority of gas blocks so the gas block can be removed over the pinned flash hider. |
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16". I like to swap HG and try out different makes. With a 14.5" and permanent FH, that's not possible. Also like the extended sight length with a FF HG which reaches further than is possible with a 14.5" barrel. Problem solved for swapping hardguards Am I missing something? It's an extended FH. If it's perm-attached, how do you change barrel nuts? I thought the same thing until I Googled it. It's a low profile design which allows the gas block or FSB to slide over t once pinned in place. Pretty slick! Yup exactly it is the same diameter .750 as majority of gas blocks so the gas block can be removed over the pinned flash hider. That is very clever. Now starts the hunt for a 14.5" M4 Colt barrel for my 6920. 
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| I'm no fan of a light weight so I'd go 14.5. If i'm going to use a 16" barrel I always go for the Mid-Length but I get the standard Govt. profile or the BFH which is Govt. profile. You're not saving much weight with the lightweight and the U.S. went to the heavier M4A1 barrel for a reason. I own half a dozen BCM BFH 16" mid-lengths so I may be bias but I also have a few BCM standard 16" mid-lengths. In the end the choice is up to you. |
I'll admit to having a few 14.5"s with perm. attached FH, That being said, seams pretty silly that we go through the trouble and expense to save just under 2" of overall length. Buying 16" makes changing rails, muzzle devices and barrels a lot simpler and cheaper. So a better question is, with all the quality 16" options available, what practical reason does anyone have to perm. attach a FH to a 14.5"barrel? making a clone is not a "practical" reason, although it is a good reason
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I'll admit to having a few 14.5"s with perm. attached FH, That being said, seams pretty silly that we go through the trouble and expense to save just under 2" of overall length. Buying 16" makes changing rails, muzzle devices and barrels a lot simpler and cheaper. So a better question is, with all the quality 16" options available, what practical reason does anyone have to perm. attach a FH to a 14.5"barrel? making a clone is not a "practical" reason, although it is a good reason Hear Hear ! If you're going to go 16" go all the way. |
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WINNER. |
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Quoted: Quoted: Quoted: Have you already decided on the rail and nut you will be using? 14.5 if you already know the rail you will use. If i go with the carbine, I'm going to pick up a drop in RAS. I won't be free floating this one. Well in that case get the 14.5 of course.. thats a no brainer +1 |
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If i go with the carbine, I'm going to pick up a drop in RAS. I won't be free floating this one. This right here is the only reason I would say go with the shorter barrel. I think it's stupid when people buy pinned 14.5's and end up having to mangle everything later because they want to free float it. |
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I have to go with 16" LW middy, in fact I have two, BCM and DD. I can't see going through the hassles of pinning a MD just to save less than 1.5". Get a can or two and you'll see the reason. I've got AAC mounts pinned on all of my 14.5s. I'll never regret pinning a mount that accepts my cans on any of my rifles. I've long sold off all my 16" rifles. I have zero need for them. They do nothing that a 14.5" 556 can't. |
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i say pinned 14.5 coz for me thats my general purpose and i have a 16 match SS too for accuracy.
been reading a lot from people not liking the pinned 14.5....its "SILLY" you can't mix n match coz its permanent...so how many times you have to change FH and rails to get what you want? |
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My vote is for the 14.5" because that extra 1.5" on the 16" is very noticeable IMO. Find a good muzzle device, a good hand guard, and leave it. There is absolutely no reason to be constantly changing your shit around... build it.... use it. But its really not 1.5", its more like 1". You need 16" total length to be legal(non SBR) so with a 14.5 you need a special 1.5" flash hider. With a 16" barrel you only need a standard FH many of which are only 1". So you are talking a total length of 16" vs. 17". For that you need to sacrifice 1.5" of rifled barrel which WILL give you less velocity in a cartridge that has effectiveness solely due to its high velocity. Does that 1" difference REALLY make the rifle so much more handy? |
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Let me explain why I went with a pinned 14.5:
1. Smallest form factor that avoids the paperwork and delay of a tax stamp (and the associated travel issue). Corollary: why get a 16 (plus the length of the muzzle device) when I can do the 14.5. Ergo, there is no reason for a 16"+MD rifle. 2. This works out to ideal physical lengths of: 16/16.1 (14.5 + MD) as a nice handling and lightweight 300yd or less rifle. Sure it'll still shoot further but we're talking 'ideal' here. 18 (+MD) as a reasonable handling rifle but now more muzzle velocity for greater effective range 20 (+MD) as a great precision distance rifle And midlength or rifle gas for each option. After all why beat up parts (and self) with carbine gas when I now have the option to avoid it. |
[ARCHIVED THREAD] - BCM - need advice (Page 1 of 2)
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