Radical Firearms AR-15 Pistol Buffer Tube Kit

Manufactured by Radical Firearms
Manufactured by Radical Firearms
4 Reviews

Out of Stock

NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.



The Radical Firearms AR-15 Pistol Buffer Tube Kit comes with everything you need to finish your pistol lower! The hardened aluminum pistol receiver extension is fully compatible with the Sig Sauer Stabilizing Arm Brace as well as the KAK Shockwave Blade.

Kit includes:
  • Pistol receiver extension
  • Standard 3 oz carbine buffer
  • Carbine spring
  • Castle nut
  • End plate
  • Comfortable foam cheek pad
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Buffer3.25 Carbine - Standard 3.00 oz
TypeStock Hardware Kit

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

Ratings & Reviews

4 reviews



by -

Attached to the back end of a Radical 10.5" pistol upper. Ran about 600 rounds of steel and brass in one session and have nothing but good things to say. No failures of any sort.

Can't go wrong i feel.

by -

As my name says I'm a Noob at AR building. But not a Noob with Fire arms in general.
<br> The treads do not feel gritty when installing. Tube feels hefty. Castle nut and End plate feel suitable. 5 stars.
<br>This was an unbeatable price. An equivalent buffer kit from another site.
<br>Rhymes with Crown-snails, wanted twice the price. And about a week to ship. This was shipped supper fast. Like Amazon Prime fast. With just basic usps priority. It was at my door in three days, from 1,579 miles away.
<br>While i am new to building ARs. I belive all my purchases going forward, might just end up coming from this site.

Good price if it's what you want.

by -

This buffer tube will NOT work with the Tailhook Mod 1 arm brace. The specs for the brace are 1.17-1.20. The diameter of this tube is 1.24. Disappointed but there was no info regarding sizing in description.

Tube diameter is thicker than you think, and could be problematic

by -

Long story short (due to character limitations), the larger tube diameter and U-shaped notch beyond the threaded portion ended up creating a huge headache for me during my install, resulting in the destruction of the tube, the castle nut, and the Spike Tac QD endplate I was planning on using. I was not very happy.
<br>FYI, for those of you using a Magpul castle nut wrench... it will NOT fit around this tube, so plan on using a different wrench for your install.