Does the Expo Arms 5.56 NATO Barreled Upper work with the PSA 5.56 Full-Auto Nitride MPI?
Upper Receiver
Expo Arms 5.56 NATO Barreled Upper
from $279.99
Bolt Carrier Group
PSA 5.56 Full-Auto Nitride MPI
from $89.99
Expo Arms upper and Palmetto State Armory bolt carrier group compatibility
Yes, they fit
The Expo Arms 5.56 NATO Barreled Upper works with the PSA 5.56 Full-Auto Nitride MPI. Our compatibility rules found no conflict between them.
This exact setup is in a real GunPartPicker build.
Counted from real GunPartPicker builds: parts lists people put together while planning to buy.
Checked by the same rules the AR builder runs on every part you add: caliber, frame size, receiver pattern, thread pitch and gas length.
Fit is judged from the specs retailers list, which can be missing or wrong. Confirm with the manufacturer before you buy, and have a qualified gunsmith check any build before you fire it.
How often builders pair the Expo Arms upper and Palmetto State Armory bolt carrier group
Backed by thousands of qualified builds that have both an upper and a bolt carrier group.
Share of builds with the Expo Arms 5.56 NATO Barreled Upper and any bolt carrier group
- This pairPSA 5.56 Full-Auto Nitride MPI11%
- KAK Industry11%
Share of builds with the PSA 5.56 Full-Auto Nitride MPI and any upper
- This pairExpo Arms 5.56 NATO Barreled Upper0.3%
Expo Arms 5.56 NATO Barreled Upper
- Of upper picks
- 0.1%
- Median paid
- $280
PSA 5.56 Full-Auto Nitride MPI
- Of bolt carrier group picks
- 3.8%
- Median paid
- $75
How we count ⌄
These shares come from GunPartPicker's build data: real parts lists people put together while planning a purchase, not sales or surveys. A build counts a part only when it is the final pick for its slot, so parts that were swapped out never count. Fit never comes from these numbers; it comes from our compatibility rules alone.
Frequently built with the Expo Arms upper and Palmetto State Armory bolt carrier group
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Charging Handle
Fits both
Lower Receiver
Fits both
Stock & Brace
Gas Block
Trigger
Pistol Grip
Expo Arms 5.56 NATO Barreled vs PSA 5.56 Full-Auto Nitride MPI: specs and prices
| Expo Arms 5.56 NATO Barreled | PSA 5.56 Full-Auto Nitride | |
|---|---|---|
| Best price | $279.99 at Primary Arms | $89.99 at Palmetto State Armory |
| Stores | 0 of 1 in stock | 1 of 1 in stock |
| Assembly | Complete | n/a |
| Platform | AR-15 | n/a |
| Gas System Length | Mid-Length | n/a |
| Caliber | 5.56 NATO | n/a |
| Receiver Type | A4 | n/a |
| Length | 16 | n/a |
| Cartridge | n/a | 5.56 NATO |
| Style | n/a | Full-Auto |
| Finish | n/a | Nitride |
Both for $369.98 at today's best prices.
Today's best prices and 90 day price history
Every store we track for each part, cheapest in stock first. Prices are checked through the day.
Price history, last 90 days
- Expo Arms 5.56 NATO Barreled Upper: lowest $279.99 on Jul 7, highest $279.99 on Jul 7 over the last 90 days.
- PSA 5.56 Full-Auto Nitride MPI: lowest $69.99 on Jul 31, highest $89.99 on Aug 11 over the last 90 days.
Bolt Carrier Groups frequently paired with the Expo Arms 5.56 NATO Barreled Upper
Most picked next to it in real builds. Only parts our rules say fit the Expo Arms 5.56 NATO Barreled Upper are listed.
Upper Receivers frequently paired with the PSA 5.56 Full-Auto Nitride MPI
Most picked next to it in real builds. Only parts our rules say fit the PSA 5.56 Full-Auto Nitride MPI are listed.
