The CMC Triggers Mil-Spec Carbine Buffer Tube Kit (brand part number 81626) gives AR-15 builders every part needed to mount a mil-spec compatible stock in one complete package. CMC Triggers machines the six-position buffer tube from 7075-T6 aluminum to mil-spec dimensions and finishes it with a Type III, Class II hard coat anodized coating, then adds through-drainage holes so water can evacuate the tube in submerged environments instead of pooling inside. The kit’s high-carbon steel castle nut and quick-detach end plate are heat treated for extra strength and finished in nitride for durability and corrosion resistance, and CMC rounds out the kit with a standard 3-ounce carbine buffer and a high-tensile steel carbine action spring. Made in the USA, it’s a complete, no-shopping-list-required foundation for any mil-spec AR-15 stock install.

Key Specifications

• Uses a six-position mil-spec buffer tube.
• Machined from 7075-T6 aluminum to mil-spec dimensions.
• Finished with a Type III, Class II hard coat anodized coating.
• Features through-drainage holes for use in submerged environments.
• Includes a heat-treated, nitride-finished castle nut for strength and corrosion resistance.
• Includes a heat-treated, nitride-finished QD end plate.
• Includes a standard 3-ounce carbine buffer.
• Includes a high-tensile steel carbine action spring.
• Made in the USA.

Frequently Asked Questions

Does this kit include everything needed to install a stock? Yes, it includes the buffer tube, buffer, spring, castle nut, and QD end plate.

Why does the tube have drainage holes? They let water evacuate the tube in submerged environments instead of pooling inside.

Buy the CMC Triggers Mil-Spec Carbine Buffer Tube Kit – 6 Position, Black Anodized

Get a complete, mil-spec buffer tube kit in one box. Order it from our CMC Triggers lineup, part of our AR buffer system selection, at our Lubbock, Texas gun shop for fast, direct shipping.