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    Order by 1PM CST for Same Day Shipping (Mon-Fri)

    The perfect kit for your next build - at a price that can't be beat.

    This Mil-Spec AR-15 Buffer Tube Kit includes the buffer tube, castle nut, lock plate, 3oz carbine recoil buffer and recoil spring. All parts are designed for easy assembly and compatibility with all your other AR-15 components.

    Backed by the AT3 Lifetime Warranty.

    Included in the kit:

    • 6 position Mil-Spec buffer tube
    • 3oz carbine recoil buffer with T6 anodized aluminum body
    • Steel Buffer Spring
    • Steel castle nut
    • Steel end plate


    • Buffer Tube Diameter: 1.146" (Mil Spec)
    • Buffer Tube Length: 7 1/4"
    • Buffer Tube Thread type: 1 3/16-16 UN-3B SPECIAL
    • Buffer Tube Material: 6061-T6 Aluminum
    • Buffer Tube Finish: Black Anodized
    • Spring Type: Carbine length, black coated
    • Castle nut type: Steel with phosphate coating
    • End plate type: Steel with phosphate coating
    • Recoil spring type: Steel
    • Buffer type: 3oz weight, carbine style

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    Customer Reviews

    Based on 11 reviews
    Would buy again

    No cheap made like others. Overall fit was perfect. Finish was good.

    Thanks for sharing your feedback, Patrick. We're glad you liked it. - AB
    Decent kit for the money

    Kit fits together great...no problems. Few scratches on surface and little bit of grit on the inside of tube, but doesn't effect shooting. Good buy for the money.

    Thanks for your feedback, Jarrod. We're glad you're satisfied with your purchase. - AB

    Awesome product easy to install

    Thanks for sharing your experience, Ricardo. We're glad you're satisfied with your purchase - AB
    AT3™ Mil Spec Buffer Tube Kit

    very good quality and fast shipping.

    Thank you for the review, David. We really appreciate you taking the time out to share your experience with us. Cheers! - AB
    What's not to like

    I'm just saying, price was right, service was fast, product was exactly what I needed. can't ask for more. thanks

    Glad you are satisfied with everything, James! We appreciate your feedback. -- LM