AR-15 Complete Pistol Buffer Tube Assembly

Pistol Buffer Tube Complete Assembly (PBT-CA)

Phase 5 WSI will not honor returns on any buffer tubes due to policy, rule, regulation, or law changes.

AR-15 Pistol Buffer Tube (PBT)™ by Phase 5 Weapon Systems Inc features our billet aluminum buffer tube, foam pad constructed of ultra-durable nitrile rubber, plus Mil-Spec end plate and castle nut. Buffer tube is compatible with Mil-Spec carbine buffer and spring, and the lower slot is machined to accept all Mil-Spec end plates and sling mounting accessories.

Outside diameter: 1.25”


Pistol Buffer Tube (PBT)

Castle Nut

End Plate

Foam Pad

Carbine Buffer - Standard 3oz

Phase 5 Enhanced Buffer Spring

Pat No.: US D717, 906 S

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Prop 65 Warning

In stock
Item Price: $59.95
Overall Length:
7.4 inches
Assembled Weight:
Made in the U.S.A.
CNC-machined aluminum buffer tube

CNC-machined 7075 T651 Certified US made billet aluminum buffer tube

Tube is designed to fit Mil-Spec carbine buffer and spring.

Hard-anodized Mil-Spec type III black finish

Classic Military anodized finish adds durability and visual appeal that ensures reliability against component wear.