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Thread: BCM 14.5 Mid Length T&E/Range Report

  1. #201
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    I'm not looking for faster split times with every pull of the trigger. What I'm looking for is less bobbles. I'm sure that it would come with time, but frankly I never would have even considered alternative triggers until I shot this gun. I've never had a trigger reset issue (well, we all have them sometimes) but the lack of reset time on this gun due to the lack of muzzle-climb leads to more of them for me and seems like an excuse to play with some of the "game" single-stage triggers to see if they have any merit.

    My way of looking at it is that the brake and muzzle device are reducing muzzle climb and I'd like to see if an aftermarket trigger improves my ability to take advantage of that feature more consistently.

    Right now they are all too cost-prohibitive for me though. I have zero interest in a trigger that equals the cost of a case of ammo as I think the case of ammo run through the gun will accomplish the same task in terms of reducing the frequency of bobbles.

  2. #202
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    Quote Originally Posted by rob_s View Post
    I have zero interest in a trigger that equals the cost of a case of ammo as I think the case of ammo run through the gun will accomplish the same task in terms of reducing the frequency of bobbles.
    Not to mention it would be a helluva lot more fun to run through a case of ammo than to replace the FCG...
    Quis custodiet ipsos custodes

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  3. #203
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    Rob-
    Gotcha. I thought you were trying to drop split times.

    Quote Originally Posted by rob_s View Post
    I have zero interest in a trigger that equals the cost of a case of ammo as I think the case of ammo run through the gun will accomplish the same task in terms of reducing the frequency of bobbles.
    I think this is a good way to look at it.
    Jack Leuba
    Director, Military and Government Sales
    Knight's Armament Company
    jleuba@knightarmco.com

  4. #204
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    Great thread. Seeing this reassures me I made the right choice with my order this week. Expecting a 14.5 Middy w/PWC556FC from BCM on Monday, they were out of regular middy hand guards when I ordered, I almost want to just wait and hope that Magpul comes out with their middy MOE HG soon. Will make my own thread when I get it all together.

  5. #205
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    Quote Originally Posted by LJNoobicon View Post
    xpecting a 14.5 Middy w/PWC556FC from BCM on Monday, they were out of regular middy hand guards when I ordered, I almost want to just wait and hope that Magpul comes out with their middy MOE HG soon.
    BCM was out when I purchased my 14.5 middy too. I ordered a set from Cav Arms and they are very nice.

  6. #206
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    Quote Originally Posted by Canonshooter View Post
    BCM was out when I purchased my 14.5 middy too. I ordered a set from Cav Arms and they are very nice.
    The wait is killing me- it is the only piece missing to my 14.5 mid.

  7. #207
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    Quote Originally Posted by Hapainwa View Post
    ......it looks like I've got some carbon building up on the rails after I shot. It's a little ways back from the pinned VLTOR gas block, and I'm wondering if this is normal. I've never had a pinned low pro block before, only the FSP.
    Do you have a pic or something? I'm not sure if I'm tracking on what you're getting at.

    With my ADCO custom crusier, I get carbon blast from the gas block under the hand guards.

  8. #208
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    Leaving for the range now...

    Going shootin' with my 16" BCM middy w/ FSC556 (and regular handguards). I'll be running Tula .223 (from CTD), Walmart 55gr Federal value pack, REAL M855 (accidentally misplaced into my buddy's gear bag on the way back ), and BVAC 5.56 NATO pressure ammo with the Hornady 75 grain TAP bullet.

    I'll advise on which buffer is best for the 16" middy; H2 or H3.

    I'll also be using standard carbine buffer spring, Springco Blue 'standard' power CS buffer spring (which I suspect is still stronger than standard), and Tubbs CS flatwire buffer spring.

    Details will be up this evening.

    Thank you to everybody else, including Markm and IG for the great info and pix. That's what makes this forum great, gentlemen. Kudos.

  9. #209
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    Just got back from the range...

    I fired about 200 rounds of M855, BVAC 75gr 5.56mm, Tula .223, and Federal .223 value pack.

    I used my carbine:
    BCM 16" middy upper w/ standard handguards
    FSC556 on muzzle
    Spike's Tactical Nickel boron (Fail zero) FA BCG
    Spike's Nickel boron (fail zero) combat trigger
    Spike's carbine lower
    BCM extractor upgrade (no o-ring)
    McFarland Gas ring
    Blackjack Buffers replacement rounded polymer buffer tip
    Slip 2000 EWL

    Springco Blue CS Buffer spring + H2:
    I started my test with the following setup using the Springco Blue standard power buffer spring and an H2 buffer. This setup worked perfectly using all ammo. It cycled and locked back on empty using the Tula .223.

    Springco Blue CS Buffer spring + H3:
    Next, I used switched-in the H3 buffer. The rifle shot smoother still. Function was perfect using all ammo as well.

    Tubbs Flatwire CS Buffer spring + H2:
    Then, I tried the Tubbs CS flatwire buffer spring using the H2 buffer. It shot smoother than the Springco Blue + H2, but not quite as smooth as the Springco + H3. No malfunctions using any ammo.

    Tubbs Flatwire CS Buffer spring + H3:
    Expecting failure, I gave this combo a try. I'm glad I did. It also functioned perfectly using all ammo. It even locked to the rear using Tula .223. The tula .223 really did feel like a rimfire conversion. Holy shit. The gun shot really smooth, even using the full power NATO pressure BVAC and M855 ammo. I tried this combo last, thinking that if the gun worked using this combo after getting all dirty, then I'd be okay and ready for more extended trials. I tested lock-back on empty repeatedly using Tula ammo...using a variety of PMAGs, brownells mags, and C-products magazines. All worked perfectly. I stopped after 200 rounds due to my stall time being up.

    Caveats:
    I'm using a coated BCG and hammer (actually all of the trigger group); this serves to reduce friction in the action. I cannot attest to the performance of a normal phosphated BCG using the Tubbs and H3 since I cannot calculate the frictional losses associated with the phosphate coating vs the nickel boron coating of my BCG. I can tell you that hand-cycling my AR feels like it is on ball bearings, and there was noticeably more friction when I was running a phosphated CMT FA BCG.

    So there you go....if you're running a 16" middy, you can run the stronger spring and an H3 if you use a FZ/Spike's BCG and at least a coated hammer.

    However, my test sample is small. Pix to follow if my wife can find the friggin camera I bought her.

    In the interest of tinkering, I am considering testing a Springco Red Extra power buffer spring or an even heavier buffer (I have a buddy who uses a super-heavy rifle buffer from Slash at Heavybuffers dot com and loves it) made from a Stainless steel body and all tungsten weights; it's supposed to be .9 oz heavier than an H3.

    As for the WHY...here's my hypothesis: I think my 16" middy can run the H3 + Tubbs CS flatwire spring due to the extra dwell time afforded by the additional barrel length in front of the gas port and the reduction in friction provided by the fail zero coated components.
    Last edited by BufordTJustice; 08-29-10 at 01:26.

  10. #210
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    The H3 is crazy SMOOTH isn't it???

    I know exactly the "Holy Shit" reaction you had with the H3. I experienced exactly that with the Hornady practice ammo.

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