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The Spikes Tactical M4 Complete Stock Kit ST-T2 takes the guesswork out of finishing an AR-15 lower. Instead of chasing down a buffer here and a castle nut there, you get the whole rear assembly in one package, and the star of the show is the ST-T2 heavy buffer that Spikes built its reputation on. This isn't a bag of throwaway parts thrown in to check a box. It's a genuine upgrade over the plain carbine hardware most rifles ship with.
The heart of this kit is the ST-T2 buffer, which tips the scale right around 4.05 ounces and gets that weight from high-density tungsten powder rather than stacked steel or sliding weights. That design does two things builders love: it kills the classic AR rattle since nothing is bouncing around inside, and it soaks up recoil impulse for a noticeably smoother, quieter cycle. It also cuts down on bolt bounce and eases wear on your bolt components over time. There are no fluids to leak and nothing to service, so once it's in, you forget about it.
This is a full rear-end solution built around a 6-position Mil-Spec buffer tube, so your stock locks in at whatever length of pull fits you and your gear. You get the collapsible M4-style buttstock, a 17-7 stainless steel carbine buffer spring, the receiver end plate, and the castle nut to torque it all down. Everything runs on standard Mil-Spec dimensions, so it drops onto typical AR-15 lowers without drama.
Whether you're finishing a fresh build, swapping out a tired factory stock, or just want your carbine to shoot flatter and feel more refined, this kit hits a sweet spot. The tungsten buffer is one of the easiest single upgrades you can make to a carbine-length gun, and getting it bundled with the rest of the rear hardware makes the whole job simple. Finished in black to match just about any setup, it's a clean, dependable way to wrap up the back end of your rifle.
Yes. The kit is built on standard Mil-Spec dimensions, so the 6-position buffer tube threads onto a typical Mil-Spec AR-15 lower receiver. It's meant to finish the rear assembly on carbine builds, upgrades, or replacements without special fitting.
The ST-T2 is a heavier buffer than the standard carbine unit most rifles ship with, weighing in around 4.05 ounces thanks to high-density tungsten powder inside. That extra mass reduces felt recoil, helps tame muzzle rise, and cuts down on bolt bounce and wear. Since it's tungsten powder rather than sliding weights, it also gets rid of the usual AR rattle and cycles more quietly.
No. There are no fluids to leak and no loose weights bouncing around inside, so it's essentially maintenance free. Once it's installed, you can leave it alone and just run the gun.
It's a standard carbine setup that works with common AR-15 chamberings like .223, 5.56 NATO, and 300 Blackout. As with any heavy buffer, if you're running a suppressor or an unusual gas setup, it's worth confirming your rifle cycles reliably with your chosen load.
| UPC | 855713006906 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | SAK0701-K |
| Color | Black |
| Model | |
| Product Type | Stock |
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