PSA AR15 Pistol Buffer Tube - 516444934

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PSA AR15 Pistol Buffer Tube - 516444934

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$ 29.99

Quick Overview

SKU: 516444934
UPC: 516444934
MFR#: 516444934

Weight: 4.35 oz

Just the thing to build an AR Pistol. 7075 aluminum tube is fluted and then hard anodized coated. Some gunsmithing required to install standard mil-spec latch plate.

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Just the thing to build an AR Pistol. 7075 aluminum tube is fluted and then hard anodized coated. Some gunsmithing required to install standard mil-spec latch plate.

SKU: 516444934
SKU 516444934
Brand Palmetto State Armory
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SKU: 516444934

Questions and Answers

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What is the tube diameter?
Kevin G on May 12, 2018
BEST ANSWER: Inner Diameter is 1 inch and the outer diameter 1 1/4 inches.


4.0 / 5.0
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requires Special Considerations with Installing and Use
The tubes fits fine and looks good. The different design , brings with it different required lower receiver extension
( aka Buffer tube) assembly part(s).

This pistol Tube requires unique tightening and different parts than other pistol tubes that can use a lower receiver extension's (buffer tube's) carbine parts. Most aftermarket Plates may require filing to fit if you want to have attachment loops or a quick disconnect socket. If you know what you need and order other parts accordingly, this is good pistol tube. If you don't , it will delay completion, causing possible confusion and frustration.

You'll need to make sure to buy a Latch Plate that doesn't have the center tab. No need to buy a Castle Nut.

If you use a Standard car latch plate like PSA AR15 CAR Stock Latch Plate SKU: 411 , the tube will not fit inside the inner ring, nor will it thread into the receiver with the latch plate in place. that standard tab in the lower inner ring will cause the blocking issue.

You need to use a Latch Plate like in PSA "40433 Pistol tube buffer kit assemble", with no inner tab.

You can drill and tap the safety assemble's spring and detent's hole on your lower receiver (if not comfortable/qualified get a gunsmith or machine shop to do it ) for a 1/8-inch 4-40 Allen head set screw. There by eliminating the need and issues of a non standard and/or modified Latch Plate to hold those vital pieces in. Some AR-15 builders forgo the latch plate in favor of this method. Research pro's and con's online. this tube excels for that choice for then not needing/having the expense of a castle nut.

You do not need, nor will you use a Castle Nut with this pistol tube. As it will thread directly into the receiver. Locking into place by tightening it against the lower receiver itself.

Instead of a Caste Nut locking it down, you tighten it against the receiver. This has its own set of Pro's and Con's. Which may require Locktite (do not use the red "permanent' strength, blue at the most but green and purple would be better choices ) to help avoid it loosening up since staking the castle Nut is not an option.

If you plan for this going into your build this great pistol receiver extension (buffer tube) for the money.
June 16, 2018
One step away from meeting expectations...
I did not notice this sentence in the description "Some gunsmithing required to install standard mil-spec latch plate."

The cut that goes thru the threads on all of the other buffer tubes I have seen is not present. The slot retains the latch plate which holds the spring/detent for the rear takedown pin. It won't be a big deal with a dremmel to put a slot in(or remove the tab on the latch plate) but not sure why this would be neglected in manufacturing process.

Other than this quirk the tube looks well made.
May 19, 2017

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