Butt Stock Kit
This section covers 5 mil-spec buttstock and lower build kits, priced $24.99 to $99.99 depending on configuration. Options include the standalone Mil-Spec AR-15 Butt Stock Build Kit and Pistol Tube Stock Build Kit, an AR-10 Butt Stock Build Kit, and two combo kits that pair a mil-spec Lower Receiver Parts Kit with either a pistol tube or rifle buttstock.
The combo listings are worth checking if you are building a lower from a stripped receiver, since they bundle the lower parts kit with the stock hardware in one order rather than requiring two separate purchases to complete the build.
Confirm whether you need a pistol buffer tube or a rifle-length buttstock before ordering, and match the platform, AR-15 or AR-10, to your specific build to make sure the components fit together correctly once assembled and installed on the lower.
Combat Armory
Combat Armory mil-spec Lower Receiver Parts Kit & MIl-Spec Pistol tube Kit
★★★★★(1)
$94.99 $129.99
Combat Armory
Combat Armory mil-spec Lower Receiver Parts Kit & MIl-Spec Rifle Buttstock Kit
★★★★★(1)
$99.99 $129.99
No butt stock kit match those filters.
Butt Stock Kit questions
What is the difference between the pistol tube kit and the buttstock kit?
The pistol tube kit is built around a buffer tube with no shoulder stock attached, for pistol-configuration builds. The buttstock kit includes a rifle-length adjustable stock for a standard rifle build instead.
Do the combo kits include the lower parts kit?
Yes, two listings bundle a mil-spec Lower Receiver Parts Kit with either the pistol tube kit or the rifle buttstock kit, so you can complete a lower build in a single order.
Is an AR-10 version available?
Yes, a Mil-Spec AR-10 Butt Stock Build Kit is listed separately from the AR-15 kits, sized to fit the larger AR-10 buffer tube and receiver extension.
What is the shipping and return policy?
In-stock kits ship within 24 hours of purchase. Unused kits can be returned within 30 days of delivery, and orders over $99 qualify for free shipping.