Results 1 to 9 of 9
  1. #1
    Join Date
    Jun 2007
    Posts
    5,530
    Downloads
    0
    Uploads
    0

    Guide for assorted rail mounted front BUIS

    Weapon System: AR15/ M16

    Manufacturer:

    Samson Manufacturing

    Lewis Machine and Tool/ LMT

    Precision Reflex Inc./ PRI

    Troy Industries

    Midwest Industries

    C4 Diopter HK Style Iron Sights

    www.magpul.com



    Item Installed: Rail Mounted Forward Back Up Iron Sight (BUIS)



    Purpose of Item: Iron sights have been supplemented by a broad variety of optics, both electronic and magnified. However, any serious weapon needs to retain some form of Back Up Iron Sight (BUIS) in case of optic failure. Anyone who has had an optic failure in a real world event becomes semi-religious in their convictions, or at least I have.

    There is a debate between some persons regarding the use of a BUIS mounted to a rail. One group of people claim that a barrel mounted front sight will retain a higher level of accuracy due to its mounting on the actual barrel, instead of a secondary piece of equipment. While I don't discount this theory, I feel that it overlooks something that is more important, which is overall reliability of the weapon system.

    Being able to hide a gas block under a rail protects it from getting knocked out of alignment. This increases overall system reliability. While there are BUIS variants that are pinned into place through the barrel, they are the exception, and not the norm. Secondly, pushing the front sight out farther on a rail, increases the sight radius, which typically allows for more accurate target engagement.

    While I can understand both sides of the arguement, my own experience involved a distance of roughly 25 yards with an armed suspect coming out a window. Reliability, and rounds on target will always be more important than claims of accuracy. After all, if you are using your BUIS, the threat most likely isn't out far enough that you are trying to figure windage or elevation.



    Tools Needed: A variety of fastening methods are used, tools needed may be an allen head wrench, a flat head screwdriver, or coin.




    Items Included: The Troy BUIS comes with the needed AK adjustment tool.
    Last edited by Stickman; 18 August 2007 at 18:25.

  2. #2
    Join Date
    Jun 2007
    Posts
    5,530
    Downloads
    0
    Uploads
    0
    PRI


    The PRI rail mounted front BUIS is manually raised and locked into position. The button on the front left side releases the lock, and allows for the unit to be raised or folded back into its flat/ stowed position. The PRI BUIS is a full shrouded unit.

    This BUIS uses a traditional M16A2 front sight post and adjustment methods.



    Name:  IMG_2621 Stick.jpg
Views: 585
Size:  149.8 KB


    Name:  IMG_2620 Stick.jpg
Views: 600
Size:  147.2 KB


    Name:  IMG_2625 Stick.jpg
Views: 609
Size:  75.7 KB

  3. #3
    Join Date
    Jun 2007
    Posts
    5,530
    Downloads
    0
    Uploads
    0
    Samson


    The Samson rail mounted front BUIS is the only one I'm currently aware of that is spring loaded, and push button released. A firm press of the button fires it into a locked upright position, and the button is pressed again to fold it back down. The release button is large, easy to use or find in the dark, and is located on the left side.

    This BUIS uses a traditional M16A2 front sight post and adjustment methods.


    Name:  IMG_2658 Stick.jpg
Views: 597
Size:  129.9 KB


    Name:  IMG_2654 Stick.jpg
Views: 505
Size:  135.8 KB


    Name:  IMG_2656 Stick.jpg
Views: 501
Size:  147.2 KB


    Name:  IMG_2655 Stick.jpg
Views: 598
Size:  133.4 KB


    Name:  IMG_2657 Stick.jpg
Views: 593
Size:  78.8 KB

  4. #4
    Join Date
    Jun 2007
    Posts
    5,530
    Downloads
    0
    Uploads
    0
    Troy


    The Troy rail mounted front BUIS is manually raised and locked into position. The button on the left side releases the lock, and allows for the unit to be folded back into its flat/ stowed position.

    This BUIS uses an AK front sight post and adjustment methods. Troy includes an AK adjustment tool with the sight purchase.


    Name:  IMG_2623 Stick.jpg
Views: 656
Size:  127.8 KB


    Name:  IMG_2622 Stick.jpg
Views: 486
Size:  124.2 KB


    Name:  IMG_2624 Stick.jpg
Views: 503
Size:  79.1 KB

  5. #5
    Join Date
    Jun 2007
    Posts
    5,530
    Downloads
    0
    Uploads
    0
    LMT

    The LMT Rail mounted Front sight is a solid, nonfolding sight. It is installed by a captured threaded thumbscrew on the left side of the sight body. This sight is often used by people who have covered their gas block with a rail in an effort to afford maximum protection for the gas block, but who prefer stock iron sights. The LMT sight duplicates the standard sight picture found on a stock Front Sight Base off a M16A2/ M4. Hand tighten, then use a coin to tighten it down a bit more. Loctite can also be used, but obviously that reduces its ability to be removed in the field.



    Name:  IMG_2617 Stick.jpg
Views: 524
Size:  110.0 KB


    Name:  IMG_2618 Stick.jpg
Views: 1020
Size:  114.8 KB


    Name:  IMG_2619 Stick.jpg
Views: 507
Size:  111.2 KB


    Name:  IMG_2626 Stick.jpg
Views: 650
Size:  75.9 KB

  6. #6
    Join Date
    Jun 2007
    Posts
    5,530
    Downloads
    0
    Uploads
    0
    C4 Diopter HK Style Iron Sights

    The C4 HK Style Diopter Rail mounted Front sight is a solid, nonfolding sight. It is installed by a phillips head screw on the left side of the sight body. This sight may be used by people who have covered their gas block with a rail in an effort to afford maximum protection for the gas block, but who prefer stock iron sights. The C4 HK Style Diopter Rail mounted Front sight duplicates the sight picture found on a HK MP5. Loctite is recommended to keep the screw in place.



    Name:  IMG_4273 Stick.jpg
Views: 1155
Size:  110.0 KB

    Name:  IMG_4274 Stick.jpg
Views: 377
Size:  116.8 KB

    Name:  IMG_4272 Stick.jpg
Views: 650
Size:  87.3 KB
    Last edited by Stickman; 18 August 2007 at 19:08.

  7. #7
    Join Date
    Jun 2007
    Posts
    5,530
    Downloads
    0
    Uploads
    0
    Midwest Industries

    The MidWest Industries rail mounted front BUIS is manually raised and locked into position. The button on the left side releases the lock, and allows for the unit to be folded back into its flat/ stowed position.

    This BUIS uses a standard AR15/M16 front sight post and adjustment methods.

    Name:  IMG_4261 Stick.jpg
Views: 517
Size:  131.6 KB

    Name:  IMG_4262 Stick.jpg
Views: 575
Size:  114.4 KB

    Name:  IMG_4263 Stick.jpg
Views: 497
Size:  122.1 KB

    Name:  IMG_4266 Stick.jpg
Views: 482
Size:  111.7 KB

    Name:  IMG_4264 Stick.jpg
Views: 576
Size:  90.7 KB

  8. #8
    Join Date
    Jun 2007
    Posts
    5,530
    Downloads
    0
    Uploads
    0
    Yankee Hill Machine has released a new line of spring loaded BUIS. These sights are raised by pressing a button on the left side of the sight, and are spring driven into their locked upright position. Lowering the sights requires the user to press the button, and fold the sights back into their stowed position.

    The front sight uses a standard M16A2 squared front sight post.


    Name:  IMG_8409-1028-Stick.jpg
Views: 578
Size:  84.9 KB


    Name:  IMG_8407-1028-Stick.jpg
Views: 664
Size:  84.7 KB


    Name:  IMG_8408-1028-Stick.jpg
Views: 577
Size:  44.5 KB


    Name:  IMG_8406-1028-Stick.jpg
Views: 591
Size:  70.4 KB

  9. #9
    Join Date
    Jun 2007
    Posts
    5,530
    Downloads
    0
    Uploads
    0
    Magpul Back Up Sight (MBUS)


    Name:  0O2P8252-1028-Stick.jpg
Views: 593
Size:  182.3 KB


    Name:  0O2P8253-1028-Stick.jpg
Views: 591
Size:  155.7 KB


    Name:  0O2P8254-1028-WEVO.jpg
Views: 476
Size:  145.1 KB


    Name:  0O2P2303-front-MBUS-2-sides-whit-bckgrnd-1028-Stick.jpg
Views: 507
Size:  65.4 KB

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •