BCM® Intermediate Receiver Extension (A5 Buffer Tube)

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For your AR15, M16, M4. A5 receiver extension (buffer tube) machined from 7075T6 and manufactured to Mil-Spec dimensions and specifications. Mil-Spec receiver extensions have a slightly smaller dimension where the stock slides on.

Hard Coat Anodized per Mil-A-8625F, Type III, Class 2

These tubes should be used with stocks such as USGI, BCMGUNFIGHTER™, Colt, LMT, SOPMOD, VLTOR, Stag Arms, and others that a made to the Mil-Spec size.

*NOTE* These buffer tubes require a rifle action spring and specific A5 buffer, carbine and rifle buffers will NOT work.

If you require a complete A5 kit, please click here
***This product contains chemicals/materials known to the State of California to cause cancer and other reproductive harm. To learn more, visit www.p65warnings.ca.gov.***

84 Reviews

  • 5
    A5 intermediate

    Posted by Kyle on Mar 7th 2021

    If you’ve used the A5 system you already know how great it is, especially for shorter barrels. Fit and finish were great, BCM QC is top notch.

  • 5

    Posted by Devan Singh on Feb 24th 2021

    Much better alternative to the VLTOR tube. Allows longer stocks to fully collapse and lock into place, and even looks better! Paired this with a VLTOR A5H2 kit and it is perfection on all of my uppers.

  • 5
    A5 Buffer Tube

    Posted by JD on Feb 23rd 2021

    Great product, I have 4 now & love it

  • 5

    Posted by James Pachecano on Feb 9th 2021

    When married to the VLTOR A5 buffer system this is hands down the best upgrade I have done. I bought a few more and put them on every rifle I have.

  • 5
    A5 receiver extension

    Posted by Adam on Feb 1st 2021

    I am a big fan of the Vltor A5 buffer system. BCM makes qaulity products so you never have to wonder if what you're buying will hold up.

  • 5
    Intermediate Receiver Extension

    Posted by MSW on Jan 17th 2021

    Typical BCM—top notch, impeccable finish & runs perfect. Lightning service—what’s not to like?

  • 5
    Intermediate Buffer tube

    Posted by Daniel Goldberg on Jan 6th 2021

    I've used the Bravo Co brand intermediate buffer tube on 3 builds now. Absolute quality and combines well with Vltor A5 buffers.

  • 5
    Great product

    Posted by AK on Nov 2nd 2020

    The recommendation to try this product come from an instructor in a class I took, and my experience with it so far (with an A5H2) has been fantastic. Very noticeable impact on recoil/muzzle rise on the carbine gassed 12.5" I'm using it on. Will put these on additional guns.

  • 5
    BCM Intermediate buffer tube

    Posted by William Valenzuela on Oct 22nd 2020

    As expected with BCM, top notch! This is a great alternative to the VLTOR tube which is ridiculously hard to find!