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Questions & Answers
Will this tube accept a stabilizing brace? Going by the picture it doesn't look like it, but want to be sure. Expert Answer

The Phase 5 Weapon Systems Inc AR-15 Pistol Buffer Tube can be used with a stabilizing brace such as the SB Tactical Pistol Brace.

by Hunter, Gear Expert, September 21, 2022
Will the geissele super 42 buffer and spring pair with this for an Ar15 pistol build? Manufacturer Answer

Yes, this buffer tube has the same internal dimension as a standard carbine tube. You will be able to use the super 42 spring and buffer.

by Phase 5 WSI, Manufacturer, November 27, 2024
Customer Reviews
Helpful Positive Review
Made properly by Luis M Ortiz Garcia, Verified Owner, October 19, 2024
The was it was built is sturdy, no sharp edges and sleek looking. I like it.
1/1 found this helpful
Helpful Positive Review
I like this product. It's a comfortable option for a pistol, it's inexpensive, durable, and makes my build look great.
1/1 found this helpful
Helpful Positive Review
Not as Pictured by John, March 23, 2023
I’m a Phase 5 fan and won’t hesitate to buy again but I should have looked at the reviews before purchasing this item. As others have stated it did not arrive as pictured with the with the “pistol” lettering
2/2 found this helpful
Helpful Positive Review
Good for ar pistol building by Ryno, Verified Owner, October 28, 2021
This buffer tube is perfect for my short barrel AR build. It looks great and is also very fuctional. The foam padding is perfect for maintaining a solid cheek weld while providing tons of comfort while shooting. Great product!
2/2 found this helpful
Helpful Positive Review
Looks to be a quality tube, billet 7075T6. I would have given it 5 stars, but it did not meet the advertised description. The one I received did not have Phase 5 logo and did not read pistol on the tube the way the ad shows. Update your photo Optics ...
Read More...
6/6 found this helpful
Helpful Positive Review
Pistol Buffer by kidfantastic, August 26, 2016
I really liked the Phase 5 Tactical AR-15 Pistol Buffer. It looks awesome on my 10.5 " pistol build. This unit installed flawlessly. Great fit and finish. The order was delivered quickly too. I would highly recommend this product.
8/8 found this helpful
Read All 13 Reviews

Phase 5 Weapon Systems Will Help You Start a New Phase!!

Blazin' Deal
Prices have been cut drastically on this product as part of a special offer. These prices are so low that there's no double-dipping with coupons or any additional discounts, but you'll still get the best deal out there. This offer won't last long, so don't miss out!
Color:
Black
Gun Make:
AR Platform
Gun Model:
AR-15
Gun Type:
Pistol
Condition:
New

Code: 1U8-RBT-PBT

MPN: PBT

UPC: 813318020406

Blazin' Deal
List: $39.95Save $2.00
$37.95

made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Phase 5 Weapon Systems Inc AR-15 Pistol Buffer Tube

Install this Phase 5 Weapon Systems Inc AR-15 Pistol Buffer Tube to ensure smooth operation of your firearm while enhancing your customizations. Each of these AR15 Lower Parts by Phase 5 Weapon Systems Inc are CNC-machined from 7075 T651 certified billet aluminum for a strong yet lightweight platform. The Phase 5 Weapon Systems Inc AR-15 Pistol PBT Buffer Tube is designed to fit a Mil-Spec carbine buffer and spring, and the lower machined slot allows for maximum compatibility. This Phase 5 Weapon Systems Inc AR-15 Pistol Buffer Tube PBT-Comp, End Plate, and Foam Pad has a hard anodized Mil-Spec type III black finish which ensures incredible reliability against wear. When you need to upgrade your existing platform, look no further than the Phase 5 Weapon Systems Inc AR-15 Pistol Buffer Tube PBT-Comp, End Plate, and Foam Pad.image

WARNING: California`s Proposition 65

Specifications for Phase 5 Weapon Systems Inc AR-15 Pistol Buffer Tube:

Manufacturer: Phase 5 Weapon Systems Inc
Color: Black
Finish: Anodized
Fabric/Material: Aluminum
Gun Make: AR Platform
Gun Model: AR-15
Gun Type: Pistol
Length: 7.4 in
Condition: New
Country of Origin: USA
Weight: 4.8 oz

Features of Phase 5 Weapon Systems Inc AR-15 Pistol Buffer Tube PBT:

  • Overall diameter: 1.25 inches.
  • CNC-machined 7075 T651 certified billet aluminum pistol buffer tube is designed to fit Mil-Spec carbine buffer and spring.
  • Hard-anodized Mil-Spec type III black finish adds durability and visual appeal that ensures reliability against component wear.
  • Machined lower slot offers maximum compatibility by accepting all Mil-Spec end plates and sling mounting accessories.
  • Includes Castle Nut
  • End Plate and Foam Pad.

Package Contents:

  • Phase 5 Weapon Systems Inc AR-15 Pistol Buffer Tube PBT
  • Castle Nut End Plate and Foam Pad

Phase 5 Weapon Systems Inc AR-15 Pistol Buffer Tube Orderable Models

List of Orderable Models

  • Phase 5 Weapon Systems Inc AR-15 Pistol Buffer Tube , MPN: PBT , UPC: 813318020406 , Code: 1U8-RBT-PBT

Phase 5 Weapon Systems Inc AR-15 Pistol Buffer Tube Unavailable & Discontinued Models

List of Unorderable Models

  • USED Phase 5 Weapon Systems Inc AR-15 Pistol Buffer Tube, EDEMO2, Used, Condition Fair, Installed/Mounted , MPN: PBT-EDEMO2 , Code: 1U8-RBT-PBT-EDEMO-IN-D
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Last updated 2026-06-29 UTC.