AR-15 Lower/Upper mil spec buffer tube kits Black

$89.69 ~~$129.99~~ In stock

Package included:
Black Ambi Charging handle
Black Mil-spec carbine buffer tube kits (buffer tube, spring, and buffer)
Black end plate
Black castle nut
Black trigger guard
Black dust cover and forward assist kits (Rod, Door,C-Clamp and Spring)
Black Ambi safety selector
Black magazine release

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Return arrangements

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Stella D. ★★★★★ Oct 13, 2026

The ambi charging handle alone was worth it, and the buffer tube kit dropped right into my build without any fitting issues. Castle nut and end plate threads were clean, no burrs anywhere.

Harper U. ★★★★★ Oct 12, 2026

Everything needed for the lower came in one bag, which saved me a second order. The ambi charging handle runs smooth and the dust cover snaps shut with a solid click. Buffer and spring dropped in without any wobble.

Aurora ★★★★★ Oct 11, 2026

The buffer tube kit fits perfectly with my build, and the trigger guard is a solid upgrade over standard plastic. Everything was packed together with no missing parts, saving me a headache.