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Thread: 14.5" Irons

  1. #1
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    14.5" Irons

    Just completed a build last fall and playing with some DIY upgrades.
    20190313_083559_mod.jpg
    20190313_083641.jpg
    20190313_084112.jpg
    20190313_084015.jpg
    20190313_084132.jpg
    Total Weight: 6.8 lbs as shown complete, no mag empty chamber
    Sight Module: 17 oz fully assembled, 20.5" Sight Radius, A2/A4 Compatible

    So far the rifle shoots great. With a 1-4X Bushnell AR Optic .75 MOA using Frontier 62 BTHP (5 shot), iron sights 1.25-1.5 MOA benched using 55 PMC Bronz (4 shot).
    The concept of the rail was to help point shoot quickly and align the sights as you gain a check weld, plus I just wanted to make it. It's built to use A2/A4 sight modules to allow for easy ranging. Durability, Time will tell with round count and slamming it on barricades.

    Parts:
    Lower: Matrix 7075-t6 Forging
    Upper: Aero Precision
    Barrel: Faxon 14.5 Match Series Mid Length Gunner 223 Wylde 416-R
    Bolt Carrier Assembly: Faxon 556 FA
    Brake: Faxon 3 Port .620", pinned and welded
    Gas Block: Faxon .625 Lightweight
    Gas Tube: Brownells Melonite
    Hand guard: Foxtrot 15"
    Grip: Magpul MOE+
    Safety Lever: 60 Degree throw (friends castaway)
    Trigger: Trigger Tech Adjustable (2 Stage short reset, sub 3lbs total)
    Mag Release: Ambi Arms Unlimited
    Sights: DPMS Rear A2, Hi Viz front sight post
    Rail: 6061-T6 Type II Anodize, Sight Radius 20.5" (DIY)
    Trigger Guard: 6061-T6 type II Anodize (DIY)
    Stock: BCM Gunfighter
    Buffer: Carbine US made, CAR Buffer
    Grip Accessory: Strike Industries Link
    End Plate: Radiant Arms Titanium 7075-T6 QD

    Faxon Barrels and Bolt Carrier Assemblies have been very impressive. assembled and tested 2 uppers both 223 wylde match series. 14.5 and 16 mid length using a CAR buffer and standard springs, Aero uppers. Barrels are a snug fit and bedded with lock tight and torqued to 40-45 ftlbs clamping the barrel not the receiver. This has yielded sub MOA groups with quality ammunition. The barrels do need 200-300 rounds for break in and favor mid weight bullets, haven't tried heavier than 62gr.

    Tested with a Leopold VXR Patrol 3-10X, 5 shot groups
    Hornady Spire 55gr ~.75 MOA (within the 150-200 rounds in)
    Hornady Frontier 62gr BTHP ~.75 MOA (250-300 rounds in)
    PMC Bronze 55gr ~1-1.25 MOA

  2. #2
    Join Date
    Sep 2012
    Location
    CDA
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    Quote Originally Posted by Scatter Eagle View Post
    Just completed a build last fall and playing with some DIY upgrades.
    20190313_083559_mod.jpg
    20190313_083641.jpg
    20190313_084112.jpg
    20190313_084015.jpg
    20190313_084132.jpg
    Total Weight: 6.8 lbs as shown complete, no mag empty chamber
    Sight Module: 17 oz fully assembled, 20.5" Sight Radius, A2/A4 Compatible

    So far the rifle shoots great. With a 1-4X Bushnell AR Optic .75 MOA using Frontier 62 BTHP (5 shot), iron sights 1.25-1.5 MOA benched using 55 PMC Bronz (4 shot).
    The concept of the rail was to help point shoot quickly and align the sights as you gain a check weld, plus I just wanted to make it. It's built to use A2/A4 sight modules to allow for easy ranging. Durability, Time will tell with round count and slamming it on barricades.

    Parts:
    Lower: Matrix 7075-t6 Forging
    Upper: Aero Precision
    Barrel: Faxon 14.5 Match Series Mid Length Gunner 223 Wylde 416-R
    Bolt Carrier Assembly: Faxon 556 FA
    Brake: Faxon 3 Port .620", pinned and welded
    Gas Block: Faxon .625 Lightweight
    Gas Tube: Brownells Melonite
    Hand guard: Foxtrot 15"
    Grip: Magpul MOE+
    Safety Lever: 60 Degree throw (friends castaway)
    Trigger: Trigger Tech Adjustable (2 Stage short reset, sub 3lbs total)
    Mag Release: Ambi Arms Unlimited
    Sights: DPMS Rear A2, Hi Viz front sight post
    Rail: 6061-T6 Type II Anodize, Sight Radius 20.5" (DIY)
    Trigger Guard: 6061-T6 type II Anodize (DIY)
    Stock: BCM Gunfighter
    Buffer: Carbine US made, CAR Buffer
    Grip Accessory: Strike Industries Link
    End Plate: Radiant Arms Titanium 7075-T6 QD

    Faxon Barrels and Bolt Carrier Assemblies have been very impressive. assembled and tested 2 uppers both 223 wylde match series. 14.5 and 16 mid length using a CAR buffer and standard springs, Aero uppers. Barrels are a snug fit and bedded with lock tight and torqued to 40-45 ftlbs clamping the barrel not the receiver. This has yielded sub MOA groups with quality ammunition. The barrels do need 200-300 rounds for break in and favor mid weight bullets, haven't tried heavier than 62gr.

    Tested with a Leopold VXR Patrol 3-10X, 5 shot groups
    Hornady Spire 55gr ~.75 MOA (within the 150-200 rounds in)
    Hornady Frontier 62gr BTHP ~.75 MOA (250-300 rounds in)
    PMC Bronze 55gr ~1-1.25 MOA
    Mother of God.....

    What type of groups do you get without a scope? How much does that magnum carry handle add to practical accuracy?
    "There is a savage beast in every man, and when you hand that man a sword or spear and send him forth to war, the beast stirs." -George R.R. Martin, A Storm of Swords

  3. #3
    Join Date
    Mar 2019
    Location
    Missouri
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    Quote Originally Posted by WickedWillis View Post
    Mother of God.....

    What type of groups do you get without a scope? How much does that magnum carry handle add to practical accuracy?
    This is during sight in with the rail at 100yds in 20 degree weather
    20190127_150833.jpg
    Making wind and elevation corrections

    20190127_150836.jpg
    1st 4 shot group without corrections. Closer to 1.75-2 MOA. I was squinting quite a bit and using a large sand bag FYI.

    Practical accuracy, maybe 2-3 MOA without squinting and a bag. The Hi-Viz post is a bit on the wide side for paper.

    I'll have to go to the range to get more photos. Pictures are proof.

    20181228_162112.jpg

  4. #4
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    Feb 2019
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    What is that thing supposed to be on the top of your gun? Looks like the aqueduct in Seattle. Can I stack two scopes on top of each other for rapid engagement?

  5. #5
    Join Date
    Jun 2013
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    205
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    15 (100%)
    So, you basically have a rifle sight radius on a carbine? That’s pretty neat. Sort of like the dissapator concept taken to the next level with a free-floated barrel.

  6. #6
    Join Date
    Oct 2014
    Location
    Central Texas
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    It kinda looks like you're trying to make an AR into a G36. While I'm not ready to mont anything like that on my AR's, I still commend your skill with a CNC and at least having a vision for something and see it materialize by your own hands. I don't want to sit here and bash it, it's not my place to do that and whether or not it really improves capability or function, you at least envisioned something and you made it with your own two hands. (and CNC Machine). That's America boss.

    Now about that trigger guard - you should make more of those trigger guards. I like the design and it looks very well finished. Good job on that.
    As to the species of exercise, I advise the gun. While this gives a moderate exercise to the body, it gives boldness, enterprise, and independence to the mind. Games played with the ball and others of that nature, are too violent for the body and stamp no character on the mind. Let your gun therefore be the constant companion of your walks."

    - Thomas Jefferson

  7. #7
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    Quote Originally Posted by RobertTheTexan View Post
    It kinda looks like you're trying to make an AR into a G36. While I'm not ready to mont anything like that on my AR's, I still commend your skill with a CNC and at least having a vision for something and see it materialize by your own hands. I don't want to sit here and bash it, it's not my place to do that and whether or not it really improves capability or function, you at least envisioned something and you made it with your own two hands. (and CNC Machine). That's America boss.

    Now about that trigger guard - you should make more of those trigger guards. I like the design and it looks very well finished. Good job on that.
    It's a manual milling machine, Rail took 9 setups and the trigger guard 3, I would LOVE a CNC but you work with what you have.
    20190313_084138.jpg

    Thanks for the comments on the rail and trigger guard. FYI look at COLT's ACR Entry in the 1980-1990's program. One feature was a sighting rib designed by the Human Engineering Labs and was not implemented; however, other features were including the flat top upper receivers for mounting optics. Technical report ARCCD-TR-92001. I know it's not for everyone, but something I wanted for kicks, and yes a red dot is probably better/more effective.

    Shop Fox M1111 bench top milling machine.
    20181230_133521.jpg

  8. #8
    Join Date
    May 2010
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    down by the river
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    As soon as I saw this I thought, “Colt’s ACR submission had a rib.”
    .25 Lorcin w/ comp and red dot AIWB and a 9mm Calico folder as primary

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