Short answer: partly. The AR-10 is a larger rifle, so the receivers, bolt carrier group, barrel, charging handle, handguard and magazines are AR-10 specific. Many small parts do swap: the trigger group, pistol grip, safety selector, and usually the stock and carbine buffer tube. AR-10s also come in two main patterns (DPMS and ArmaLite), so check the pattern before you buy AR-10 parts.
What swaps and what doesn't
| Part | AR-15 part in an AR-10? | Notes |
|---|---|---|
| Trigger group | Usually yes | Most AR-10 lowers use the same small-pin trigger |
| Pistol grip and safety selector | Yes | Same mounting |
| Stock | Usually yes | Check that it suits your buffer tube |
| Carbine buffer tube | Often | Buffers and springs can differ by maker |
| Optics and mounts | Yes | Picatinny is Picatinny |
| Gas block | Depends on the journal | Match the barrel's journal size, not the platform |
| Muzzle device | Only if .30 caliber | AR-10 barrels are usually 5/8x24 |
| Upper and lower receivers | No | AR-10 size, and DPMS vs ArmaLite patterns differ |
| Bolt carrier group, barrel, charging handle | No | AR-10 specific |
| Handguard and magazines | No | AR-10 specific (match the pattern) |
DPMS vs ArmaLite pattern
DPMS-pattern (LR-308) receivers are the most common and take SR-25-style magazines such as the Magpul PMAG 20 LR/SR. ArmaLite-pattern receivers differ in how the upper fits and in some magazines, so an upper and lower from different patterns may not go together.
Parts that fit
Compare AR-10 lower receivers, triggers and stocks. The builder flags AR-15 parts that won't fit an AR-10 build, and the other way round.
Wondering how a .308 AR-10 shoots? See published velocity, energy and drop in our .308 ballistics chart.
Frequently asked questions
Will an AR-15 trigger fit an AR-10?
Usually yes: most AR-10 lowers use the same small-pin trigger group. Check your lower's pin size.
Can I use an AR-15 bolt carrier group in an AR-10?
No. The AR-10 bolt carrier group is larger and made for .308-size cartridges.
Do AR-15 magazines fit an AR-10?
No. AR-10s use larger magazines, usually SR-25 pattern (such as PMAG 20 LR/SR) on DPMS-pattern rifles.
Will an AR-15 stock fit an AR-10?
Usually, on a carbine buffer tube of the same spec, but the buffer and spring may be AR-10 specific.
