Review: Blackhawk/Knoxx SpecOps Folding Stock for 870 Shotgun

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  • techres

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    Mar 14, 2008
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    ITEM: Blackhawk/Knoxx SpecOps Folding Stock for 870 Shotgun

    COST: $109/New (~$75-80 Used)

    Included: Stock with screw

    PURPOSE: Reduce felt recoil while maintaining small storage size.

    AVAILABILITY: Readily available online.

    Host Shotgun:

    The host shotgun for this test is a Remington 870 clone made by Norinco of China and picked up used at a pawn shop cheap. The original intent for the shotgun was that of a trunk gun or stowaway gun due to it's simplicity and cost.

    While the shotgun came with a spare barrel and shoulder stock, the stock was longer than comfortable and the pistol grip configuration works better for storage so it was kept:

    8440301102_ab17ae9586_c.jpg


    8439210243_5e09bf3244_c.jpg


    The only problem with this configuration is being able to use the shotgun accurately without losing teeth to heavy recoil when using buck shot. Here is a shot with birdshot:

    [ame="http://youtu.be/HNLyQyh6kLw"]http://youtu.be/HNLyQyh6kLw[/ame]

    And 4 more with birdshot ending with one round of buckshot:

    [ame="http://youtu.be/sQ1V548yKp0"]http://youtu.be/sQ1V548yKp0[/ame]

    Note that I did not lose teeth there, but it was kinda closer than I would like. That is what leads to wanting a solution that combined three qualities: compact storage size, shoulder support, and shorter stock.


    The SpecOps Stock:

    The stock is simple to install. The stock includes a captured stock screw that screws directly into the receiver of the 870. That is all installation requires.

    8439216399_7e50ac598d_c.jpg


    The stock is an over folding wire stock kit that changes position by pinching together the wire portions and freeing them from the locks holding the stock firmly in place.

    Mechanically it works to reduce recoil by allowing the receiver to move within the stock upon recoil. As it moves springs inside the grip eating up energy until the receiver reaches the end of travel - striking a rubber cup and sending the receiver back to the start of travel.

    [ame="http://youtu.be/PDN3yVIHN1A"]http://youtu.be/PDN3yVIHN1A[/ame]

    Time to test function.

    Operation:

    The regular grip's recoil is measured in the stinging sensation in the firing hand. The recoil with the regular grip & firing buckshot is near uncontrollable and is the source of many "tooth removal" videos on the net.

    This is about to change...

    First a test with the stock extended:

    [ame="http://youtu.be/Xm-0s_Ce4Mw"]http://youtu.be/Xm-0s_Ce4Mw[/ame]

    Recoil was reduced on the order of 1/3rd or so. Sight picture was ok and length of the stock was great. It is odd to no really weld in that cheek but I could get used to it.

    Second test with stock folded:

    [ame="http://youtu.be/5BrgHeVATc8"]http://youtu.be/5BrgHeVATc8[/ame]

    Significant reduction in recoil felt. Really reduced. The trade off is the stock forces a mid-body hold as the recoil system is in the way for a waist hold and the stock blocks view in a face level hold. For the high hold you can sight down the side of the receiver and maintain reasonable accuracy.

    Final Notes:

    I like the stock for it's reduction in recoil and will keep it for use, especially when I plan to do extended shooting or have a new/young person shoot it.

    I can accept the weight addition in the system as it really only pushes the center of gravity back 6-8" and is not that big of a deal.

    The main concerns that I need to address are sight picture while folded and grip. The latter is really a training issue while the former may include some simple modifications to the stock with a cutting tool.

    Overall it was worth the $75 I paid for it and I will keep it.
     
    Last edited:
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