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    Adjustable Carbine Stock & Buffer Tube Assembly Adjustable Carbine Stock & Buffer Tube Assembly Adjustable Carbine Stock & Buffer Tube Assembly Adjustable Carbine Stock & Buffer Tube Assembly

    Adjustable Carbine Stock & Buffer Tube Assembly

    This butt stock kit includes both an adjustable carbine stock and buffer tube assembly. The adjustable carbine stock is constructed from a durable polymer composite and is designed for quick adjustment. Additionally, this carbine butt stock offers three...

    Was: $47.99
    Now: $39.99
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    ar-15-buffer-tube-assembly-mil-spec-1

    Mil-spec AR-15 Buffer Tube Assembly

    The AR-15 Mil-Spec Buffer Tube Assembly is made out of durable 6061-T aluminum, making this product very lightweight. The 3-ounce buffer and carbine coated spring ensure a smooth and reliable operation. The mil-spec six position receiver extension allows...

    Was: $35.99
    Now: $29.99
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    ARQD100 AR-15 QD Backplate by Sylvan Arms ARQD100 AR-15 QD Backplate by Sylvan Arms

    Sylvan Arms AR-15 QD Backplate

    By now, you're surely aware of the benefits of using a QD sling for your AR-15, and you've landed here because you're looking to upgrade. You have the sling, but where do you attach it, and what if you're left handed? If you prefer to keep your AR close...

    Was: $23.99
    Now: $19.99
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    AR15 Enhanced Carbine Buffer Kit by Aero Precision AR15 Enhanced Carbine Buffer Kit by Aero Precision AR15 Enhanced Carbine Buffer Kit by Aero Precision

    AR15 Enhanced Carbine Buffer Kit by Aero Precision

    You already know you need a buffer tube assembly on your AR-15. And usually it's nothing "special." You screw parts onto other parts, and it serves its purpose as part of your AR. You spend your hard-earned money on these parts, so it'd be great if...

    Was: $56.09
    Now: $46.74
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    AR15/AR10 Enhanced Carbine Buffer Tube by Aero Precision AR15/AR10 Enhanced Carbine Buffer Tube by Aero Precision AR15/AR10 Enhanced Carbine Buffer Tube by Aero Precision AR15/AR10 Enhanced Carbine Buffer Tube by Aero Precision AR15/AR10 Enhanced Carbine Buffer Tube by Aero Precision

    AR15/AR10 Enhanced Carbine Buffer Tube by Aero Precision

    You may consider the buffer tube to be nothing fancy, and simply "one of the parts" you need to make your AR-15 build work. And while it's true you need a buffer tube, it can also be true at that having the right one can enhance your building and...

    Was: $40.79
    Now: $33.99
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Mil-spec buffer tube assemblies for all AR platforms available.

The buffer assembly is required for completing your AR-type rifle or pistol lower. Whether you built an 80 percent receiver or grabbed a stripped lower from an FFL, all buffer assemblies and tubes listed are compatible! That includes 9mm, 5.56, .223, .308, 6.5 builds, and 300 BLK. Each buffer tube we sell is manufactured in the U.S.A from forged (7075-T6) aluminum, and finished with the tried-n-true Type III Hardcoat anodized finish that matches your upper and lower.

 

Commercial vs. mil-spec buffer tubes explained.

What's Included With Each Buffer Kit

Each buffer tube kit includes all the parts required for installing and completing your lower assembly, with optional stocks and pistol braces available depending on your AR's configuration:

  • Mil-spec threaded buffer tube
  • Mil-spec threaded castle nut
  • Standard receiver latch plate
  • Carbine 3.0-ounce buffer (5.56, .223, 6.5 Grendel, and 300 BLK) 
  • or... Heavy / "H" 3.8-ounce buffer (.308, 6.5 Creedmoor)

Want a Sling? Grab an Upgraded Latch Plate

The latch plate, located at the rear of the lower receiver and underneath the buffer tube, is the perfect place for installing a single-point or two-point sling. This location provides an easy transition between the low- and high-ready positions for a shooter in any stance, and it allows your AR to hand vertically at your chest and waist when not carried. Grab the awesome-but-affordable QD plate from Sylvan Arms, and pair it with any QD swivel sling for a comfortable and convenient carry solution.

"How do I install my buffer assembly?"

It's easy! You'll need an Armorer's Wrench to properly tighten your buffer tube via the castle nut. Grab an Armorer's Wrench here. Next, check out our guide that shows how to install your lower parts kit. The buffer installation is part of this process and it only takes a few minutes. 


DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At GunBuilders.com, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.

We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.