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Receiver Extension (Buffer) Parts

Various sets and individual items that make up the receiver extension are all here on AT3. The buffer tube, spring, buffer, castle nut, and the locking ring are all available for the milspec or the commercial variants.

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3 reviews
$67.85

- 6 Position Hard Coat Anodized T6 Aluminum Mil Spec Buffer Tube - Hard Coat Anodized T6 Aluminum Buffer - Military Spec Thread Diameter for a Tight Fit on AR-15 Receivers - Military Spec Tube Diameter to Provide a Tight Fit on After Market Buttstocks - Buffer Spring - Steel Military Grade E-Coating Castle Nut - Steel Military Grade E-Coating...

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1 review
$59.99

The LBE Unlimited Mil-Spec Buffer Tube Kit for the AR15 comes with a buffer tube, castle nut, lock plate, recoil buffer and recoil spring. Get all the parts you need with the MILBUFKT.  FEATURES: Mil spec lower receiver buffer tube extension kit Aluminum construction -  Light and strong SPECIFICATIONS: Material: Aluminum Finish: Matte black Includes:  Buffer tube, castle nut, lock plate, recoil...

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1 review
$24.97

The UTG Pro 6-position Mil-Spec receiver extension is precision machined from 6061 T6 aluminum forgings to true Mil-Spec dimensions. Provides a solid fit for with most aftermarket buttstocks. Brand UTG Finish:  Anodized - Matte Black Material: 6061-T6 Aluminum Weight 5.44 oz Platform: AR-15 Carbine Outer Diameter 1.15 Positions: 6 Dimensions 7.80" L   Not sure if you need Mil-spec or...

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$29.85

Easily replace the receiver extension tube on your AR-15 with this six position MIL SPEC adjustable buffer tube. Features aluminum construction with a matte black anodized finish, six precision machined notches to securely grip the stock locking pin allowing for positive stock adjustments. Thread size 1 3/16-16 UN 3B special Military Diameter 6 Position Buffer Tube 1.14" Diameter (Mil Spec) 7.25"...

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$21.85

The LBE Unlimited Recoil Buffer for the AR15 dampens the effects of recoil. Tone it down a bit with the ARBUFF. FEATURES: Recoil Buffer for the AR15 SPECIFICATIONS: Finish: Pearl Silver Weight: 3 oz

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$49.99

The LBE Unlimited Commercial Buffer Tube Kit for the AR15 comes with a buffer tube, castle nut, lock plate, recoil buffer and recoil spring. Get all the parts you need with the CBUFKIT. FEATURES: Commercial-spec lower receiver buffer tube extension kit Aluminum construction -  Light and strong SPECIFICATIONS: Material: Aluminum Finish: Matte black Includes:  Buffer tube, castle nut, lock plate,...

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$26.35

The LBE Unlimited Recoil Buffer Tube is made from 6061 Aluminum. For your Six Position Commercial Spec Buffer Tube, get the BUF001. FEATURES: 6061 Aluminum - Light and strong Six Position Commercial Spec Buffer Tube - made for commercial spec buttstocks only SPECIFICATIONS: Material: 6061 Aluminum

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1 review
$67.85

- 6 Position Hard Coat Anodized T6 Aluminum Buffer Tube - Commercial Tube Diameter - Buffer Spring - T6 Aluminum Recoil Buffer - Steel Castle Nut - Steel Locking Ring - Made in the USA Not sure if you need Mil-spec or commercial buffer tube? The below image shows the difference in dimensions

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$14.85

The LBE Unlimited ARLPLT is an AR-15 Buffer Tube Lock Plate made from 4140 Steel. It is Manganese Phosphate coated to protect it and make it last longer.   FEATURES: 4140 Steel - Strong and tough Manganese Phosphate coated - Protected to last   SPECIFICATIONS: Material: 4140 Steel Finish: Manganese Phosphate coated

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$12.85

The LBE Unlimited Recoil Spring for the AR15 reduces the feel of the mechanical recoil of your AR.  It is used in coordination with the buffer tube and buffer, as part of the overall recoil system.  FEATURES: Recoil Spring; Reduces the feel of the mechanical recoil of your AR SPECIFICATIONS: Weight: 0.13 lbs

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Thread size 1 3/16-16 UN 3B special Military Diameter 6 Position Buffer Tube (previously 5 position). 1.14" Diameter 6 locking positions including fully extended and fully collapsed.

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Don't rely on inferior buffer tubes when assembling the collapsible stock for your AR-15 style rifle. The INTRAFUSE buffer tube from TAPCO is manufactured using impact extruded 7075 T6 aircraft aluminum with a Mil-Std 171 matte black exterior coating and a Mil-Spec dry film lubricant inside the tube that makes the action extremely quiet. Proudly made in the U.S.A.