AR-15 Carbine Buffer Tube

The AR-15 Carbine Buffer Tube is sometimes known as the receiver extension tube. This carbine buffer tube is what you need to install a carbine length collapsible stock onto your AR-15 style rifle.

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American Owned and Operated


20+ Years In Business

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Ships from Pennsylvania


The AR-15 receiver extension, also known as a buffer tube, is a mil-spec buffer tube manufactured in America. Most experienced AR15 shooters replace their commercial buffer tubes with mil-spec buffer tubes for a better lockup on their collapsible stocks.

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Customer Reviews

Review by Khari Z.
Verified Buyer
Received in four days after placing my order. Will be back to shop from KS again.
Review by Ulysee W.
Verified Buyer
Delighted with this purchase.
Top-Notch Spare Part A++
Review by Payton H.
Verified Buyer
I bought two of these carbine buffer tubes. Used one for repair, other is stored in my spares box.
Just as pictured.
Review by Holt M.
Verified Buyer
Would Recommend this AR15 carbine buffer tube
Review by Errick K.
Verified Buyer
Finest AR15 carbine buffer tube for the price sold by a awesome company. Thank you KEEPSHOOTING!
Fast Delivery
Review by Epifanio F.
Verified Buyer
Leading AR15 carbine buffer tube for the price shipped by a terrific company. Thank you keepshooting!
Great for my use
Review by Amanuel F.
Verified Buyer
Parts look perfect. Exactly what I wanted.
Just as described.
Review by Moussa G.
Verified Buyer
Satisfied with this order.
Review by Nazareth G.
Verified Buyer
Perfect replacement carbine buffer tube for my AR15.
Quick Shipping
Review by Dominque X.
Verified Buyer
Cost is excellent and shipping was fast.
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