Short answer: a complete stock kit is the stock plus the parts it rides on: buffer tube, castle nut, end or latch plate, buffer and buffer spring. Buy one when your lower has no buffer tube yet. A furniture kit is the parts you hold: usually a stock and pistol grip, sometimes a foregrip or handguard, chosen to match. It assumes your tube is already installed. Check the box contents, because makers use the names loosely.
Stock kit or furniture kit? What is in the box
| Kit | Example | Includes | Does not include |
|---|---|---|---|
| Complete stock kit | Spike's Complete M4 Stock Kit | M4 stock, 6-position mil-spec buffer tube, latch plate, castle nut, 17-7 stainless buffer spring, ST-T2 heavy buffer | Pistol grip, handguard |
| Furniture set | Daniel Defense buttstock, pistol grip and vertical foregrip combo | Collapsible stock, pistol grip with integral trigger guard, vertical foregrip (Picatinny or M-LOK) | Buffer tube parts, handguard |
| Grip and stock kit | Hogue grip and collapsible buttstock kit | Beavertail finger-groove grip, mil-spec collapsible buttstock | Buffer tube (Hogue sells assemblies that include it) |
Contents are from Spike's Tactical, Daniel Defense and Hogue, read October 2026.
When you need a complete stock kit
A stripped lower has nothing at the back. To fit a collapsible stock you also need the buffer tube, the end or latch plate and castle nut that hold it, the buffer and the spring. A complete stock kit puts all of that in one box; Spike's, for example, ships its M4 stock with a 6-position mil-spec tube, latch plate, castle nut, a 17-7 stainless spring and an ST-T2 heavy buffer. Check the buffer weight suits your rifle with our buffer weights guide, and torque the castle nut to spec (see AR-15 torque specs).
When a furniture kit makes sense
If your lower already has a tube, a furniture kit changes the look and feel: stock, grip and sometimes a foregrip or handguard in one finish. Daniel Defense's combo pairs its collapsible stock, which it says fits mil-spec tubes snugly without a friction lock, with a pistol grip at a 1911-style angle and a vertical foregrip. Match the foregrip to your rail: Daniel Defense says its Picatinny grip does not fit KeyMod or M-LOK, so buy the M-LOK version for an M-LOK handguard (see M-LOK vs KeyMod vs Picatinny).
What to check before you buy
- Tube diameter. A mil-spec stock needs a mil-spec tube; see mil-spec vs commercial.
- Tube type. Carbine, rifle and A5 tubes take different stocks and buffers; see buffer tube types.
- What is actually included. Hogue's grip and stock kit fits a mil-spec tube but does not list one; its assemblies with the tube are separate products.
- State laws. Some states name telescoping stocks and pistol grips in their rifle definitions; see our featureless AR-15 guide.
Stock kits and furniture kits, with today's prices
Lowest price across the stores we track:
Spike's Tactical Complete M4 stock kit
Pros
- Stock, mil-spec tube, latch plate, castle nut, spring and ST-T2 buffer
- Everything for a stripped lower
Cons
- Heavy buffer may not suit every rifle
Complete kit
LBE Unlimited AR-15 complete stock kit
Pros
- Sold as a complete stock kit
Cons
- Check the listing for exact contents
Complete kit
BCM mil-spec buffer tube stock hardware mounting kit
Pros
- Tube hardware for the stock of your choice
- Mil-spec
Cons
- No stock included
Hardware only
Furniture sets, with today's prices
Daniel Defense collapsible furniture set
Pros
- Stock, pistol grip and vertical foregrip
- Stock fits mil-spec tubes
Cons
- No buffer tube parts
Furniture set
Hogue grip and collapsible buttstock kit (mil-spec)
Pros
- Overmolded rubber grip and stock
- Fits a mil-spec tube
Cons
- Buffer tube not included
Grip and stock
Luth-AR complete retro A2 furniture kit
Pros
- Retro A2-style furniture
Cons
- Check the listing for which parts are included
Retro
Prefer to choose each part? See our best AR-15 stocks and best AR-15 pistol grips, browse stocks, grips and handguards, and put it together in the AR-15 builder.
Frequently asked questions
What comes in an AR-15 stock kit?
A complete stock kit usually has the stock, buffer tube, castle nut, end or latch plate, buffer and spring. Spike's, for example, includes a 6-position mil-spec tube and an ST-T2 heavy buffer.
What is an AR-15 furniture kit?
A matched set of the parts you hold: usually stock and pistol grip, sometimes a foregrip or handguard. Daniel Defense's set is a stock, grip and vertical foregrip.
Do furniture kits include a buffer tube?
Usually not. Hogue's grip and stock kit, for example, fits a mil-spec tube but does not list one; check the box contents.
Do I need a stock kit for a stripped lower?
Yes, or buy the tube, plate, castle nut, buffer and spring separately. A complete stock kit has them all.
Will a furniture kit fit any AR-15?
The stock must match your tube (mil-spec or commercial, carbine or rifle), and any foregrip must match your rail type.
Can I mix brands instead of buying a kit?
Yes. Any mil-spec stock fits a mil-spec carbine tube, and grips share a standard mount; kits mainly save time and match finishes.
