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The AR 15 pistol has taken the firearms community by storm, and for good reason. Many firearms enthusiast want a SBR (short barrel rifle), but don’t take too keenly to the process involved in getting one. AR 15 pistols can feature barrels as short as 7.5 inches, similar to SBRs, but don’t require the tax stamp as they are shot and held like a pistol. They also make great home defense weapons as they offer better handling than a full-size rifle or shotgun and more firepower than a typical handgun. Not to mention, how many handguns have you seen that accept 30 round magazines and still retain mobility?

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Rock River Arms Pistol Receiver Extension (Buffer Tube) 113P Rock River Arms - Pistol Receiver Extension (Buffer Tube) 113P

Rock River Arms Pistol Buffer Tube.

Our Price: $24.99
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KAK Industry - Super SIG SB-15 Buffer Tube KAK Industry - Super SIG SB-15/SBX Pistol Buffer Tube

KAK Industry Super Sig SB-15 dedicated pistol buffer tube.

List Price: $42.00
Our Price: $39.99
Savings: $2.01
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KAK Industry- Sig Tube Length Adjustment Ring Kit KAK Industry - Sig Tube Length Adjustment Ring Kit

Used for adjusting the length of the Sig brace for proper fit on the forearm.

Our Price: $11.99
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Phase 5 Tactical - Pistol Buffer Tube

Phase 5 Tactical AR-15 Pistol Buffer Tube.


Includes: Buffer tube, Mil-Spec End Plate, Mil-Spec Castle Nut and Foam Rest Pad.

Our Price: $49.95
In Stock
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Phase 5 Tactical Pistol Buffer Tube Assembly Phase 5 Tactical - Pistol Buffer Tube Assembly

CNC Machined from 7075, the Phase 5 Pistol Buffer Tube (PBT) Assembly, is a great choice when building an AR pistol. One of the few Pistol buffer tubes kits to accommodate a castle nut in additions to the receiver end plate so you know it will stay in place.

Phase 5 Tactical AR-15 Pistol Buffer Tube Assembly Includes: Buffer tube, Spring, Carbine Buffer, Mil-Spec End Plate, Mil-Spec Castle Nut and Foam Rest Pad.

Our Price: $69.95
(Out of Stock)
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Phase 5 Tactical Pistol Brace Strap Set Phase 5 Tactical - Strap Set for SigTac Pistol Brace

Personalize you SigTac Brace equipped AR pistol with these custom straps from Phase 5 Tactical. Available in a variety of colors.

Our Price: $18.00
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Phase 5 Lo Pro Slope Nose Quad Rail Phase 5 Tactical - 7.5" LO-PRO SLOPE NOSE (LPSN) FREE FLOAT QUAD RAIL

Phase 5's 7.5" free float hand guard. Perfect for your AR Pistol build. Extensive quality control and finish including hand deburring prior to being anodized. Features 2 Q.D. rotation limited attachment points on forward end. Not compatible with Phase 5 pigtail gas tube.

Our Price: $179.99
In Stock
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Phase 5 Tactical HexOne Pistol Buffer Tube Phase 5 Tactical - HexOne Pistol Buffer Tube

Phase 5 Tactical HexOne Pistol Buffer Tube
Includes: Hexone (hex shaped) Buffer tube, Mil-Spec End Plate, and Mil-Spec Castle Nut, Carbine Buffer, and Carbine Buffer Spring.

Our Price: $49.95
In Stock
Phase 5 Tactical Hex-2 Pistol Buffer Tube Phase 5 Tactical - Hex-2 Pistol Buffer Tube

Phase 5 Tactical Hex-2 Pistol Buffer Tube

Includes: Hex / smooth shaped Buffer tube, Mil-Spec End Plate, Mil-Spec Castle Nut and foam pad.

Our Price: $59.99
(Out of Stock)
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Phase 5 Tactical Pistol Buffer Tube Foam Pad Phase 5 Tactical - Pistol Buffer Tube Foam Pad

Replace your worn out foam pad on the your Phase 5 Tactical Pistol Buffer tube or can be installed on other manufacturers AR pistol buffer tube measuring 1.25" in diameter. 3.5" inches in length yet still short enough to clear charging handle.

Our Price: $7.95
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Phase 5 Tactical Hex-2 Pistol Buffer Tube Assembly Phase 5 Tactical- Hex-2 Pistol Buffer Tube Assembly

Phase 5 Tactical Hex-2 Pistol Buffer Tube

Includes: Hex/ Smooth Shaped Buffer tube, Mil-Spec End Plate, Mil-Spec Castle Nut, Carbine Buffer, Carbine Buffer Spring, and Foam Pad.

Our Price: $78.99
(Out of Stock)
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Phase 5 Tactical HexOne Pistol Buffer Tube Assembly Phase 5 Tactical - HexOne Pistol Buffer Tube Assmbly

Phase 5 Tactical HexOne Pistol Buffer Tube Assembly
Includes: Hexone (hex shaped) Buffer tube, Mil-Spec End Plate, and Mil-Spec Castle Nut, Carbine Buffer, and Carbine Buffer Spring.

Our Price: $69.95
(Out of Stock)
Stainless Steel Gas Tube AR15 - Pistol length

AR15 Gas Tube for AR -15 / M16 Rifle. Stainless Steel

Made in USA

Our Price: $9.99
In Stock
RBA 5.56 7.5" AR Pistol Barrel 1-9 Twist - Chrome-Lined RBA 5.56 7.5" AR Pistol Barrel 1-9 Twist - Chrome-Lined

Quality US Made 7.5" AR 15 barrel for 5.56/.223 featuring pistol length gas system, M4 feed ramps, 1-9 twist rate, and Chrome- lined bore for increased life and corrosion resistance. Barrel uses pistol length gas tube, and .750" diameter gas block. Weight: 15.7 oz.

List Price: $189.00
Our Price: $144.95
Savings: $44.05
(Out of Stock)
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RBA 5.56 7.5" AR Pistol Barrel 1/9 Twist Rate

Quality US Made Red Barn Armory 7.5" AR 15 barrel for 5.56/.223 featuring pistol length gas system, M4 feed ramps, 1-9 twist rate. Barrel takes .750" diameter gas block. Weight: 15.7 oz.

List Price: $149.00
Our Price: $124.99
Sale Price: $119.99
Savings: $29.01
(Out of Stock)
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RBA 5.56 10.5" AR Pistol /SBR Barrel 1/7 Twist

Quality US Made Red Barn Armory 10.5" AR 15 barrel for 5.56/.223 featuring carbine length gas system, M4 feed ramps, 1-7 twist rate. Melonite finish for increased life and wear resistance. Barrel accepts .750" diameter gas block. Weight: 16.9 oz.

List Price: $149.00
Our Price: $124.99
Savings: $24.01
(Out of Stock)
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Sig Sauer (Sig Tac) SB15 Pistol Stabilizing Brace Sig Sauer SB15 Pistol Stabilizing Brace for AR Pistol - (Black, or FDE)

SIG SAUER® introduces the SB15 Pistol Stabilizing Brace, a shooter’s aid that is designed to improve the single-handed  shooting performance of buffer tube equipped pistols.

This veteran-designed and U.S.-manufactured accessory enhances accuracy and reduces felt recoil when using an AR-style pistol.

Our Price: $129.95
In Stock
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Sig Sauer SBX (Gen 2) Pistol Stabilizing Brace Sig Sauer SBX (Gen 2) Pistol Stabilizing Brace BLK - Free Shipping

SigTac SBX (Gen 2) Pistol Brace


Our Price: $139.99
Sale Price: $124.99
Savings: $15.00
In Stock
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Spike's Tactical Pistol Buffer Tube Assembly

If your building a pistol based AR15 then you will want to go with a pistol buffer tube likes this from Spike's Tactical. Of course it's quality made and includes a 17-4 stainless buffer spring and the infamous ST-T2 buffer, it also one of the few true pistol buffer tubes to use a receiver end plate and castle nut (both included). The other cool feature unique the Spike's Tactical Pistol Buffer Tube Assembly is that they integrated a QD socket on the rear of the tube so you can attach your QD equiped sling to the end.

Our Price: $69.99
In Stock
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Like the AR 15 rifle, the AR 15 pistol has a modular design that allows for an unlimited amount of customization, as well as the manufacturing of compatible parts by a variety of machine shops. At Red Barn Armory, you can find AR pistol buffer tubes, rails, grips, handguards, and AR pistol barrels for sale at great prices. We carry only the best parts and accessories from manufacturers like:

  • RBA
  • AP Custom
  • Noveske
  • Phase 5
  • Sig Sauer
  • Fortis Mfg
  • Aero Precision
  • Spike’s Tactical and more

Enjoy an AR15 Pistol with a short barrel like you find on an SBR, without the fees and wait time associated with obtaining a tax stamp. An AR 15 pistol buffer tube installs in similar fashion as the common buttstock on the AR 15 rifle, allowing for more mobility in tight hallways or corridors. Protect your home and family with the proven effectiveness of the 5.56 and the mobility of a pistol, and save even more with FREE shipping on orders over $99!


Please Note: An AR pistol is similar to a short barrel rifle (SBR) only in that it can be manufactured with a barrel length less then 16 inches. It is not a short cut or way around the BATFE NFA Tax stamp requirements. If you plan to build or by an AR pistol and shoulder and shoot in the same fashion as a rifle you may be in violation of federal and possible state laws as well.