Does the Aero X15 Stripped Lower – Anodized work with the PSA Upper 5.56 16" Mid-Length Nitride?
Lower Receiver
Aero X15 Stripped Lower – Anodized

Upper Receiver
PSA Upper 5.56 16" Mid-Length Nitride 13.5" M-LOK
from $249.99
lower and Palmetto State Armory upper compatibility
Yes, they fit
The Aero X15 Stripped Lower – Anodized works with the PSA Upper 5.56 16" Mid-Length Nitride 13.5". Our compatibility rules found no conflict between them.
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 lower and Palmetto State Armory upper
Backed by tens of thousands of qualified builds that have both a lower and an upper.
Share of builds with the Aero X15 Stripped Lower – Anodized and any upper
Share of builds with the PSA Upper 5.56 16" Mid-Length Nitride and any lower
Aero X15 Stripped Lower – Anodized
- Of lower picks
- 0%
- Median paid
- n/a
PSA Upper 5.56 16" Mid-Length Nitride
- Of upper picks
- 1.1%
- Median paid
- $220
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 lower and Palmetto State Armory upper
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Bolt Carrier Group

PSA 5.56 Full-Auto Nitride MPI
Fits both
Stock & Brace
Pistol Grip
Aero X15 Stripped Lower – vs PSA Upper 5.56 16" Mid-Length: specs and prices
| Aero X15 Stripped Lower – | PSA Upper 5.56 16" | |
|---|---|---|
| Best price | n/a | $249.99 at Palmetto State Armory |
| Stores | n/a | 1 of 1 in stock |
| Assembly | Stripped | Complete |
| Platform | AR-15 | AR-15 |
| Caliber | Multi | 5.56 NATO |
| Finish | Hardcoat Anodized | n/a |
| Color | Black | n/a |
| Gas System Length | n/a | Mid-Length |
| Length | n/a | 16 |
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.
Aero X15 Stripped Lower – Anodized
No store lists it today.
PSA Upper 5.56 16" Mid-Length Nitride 13.5"
- Palmetto State Armory$249.99
Price history, last 90 days
- PSA Upper 5.56 16" Mid-Length Nitride: lowest $219.99 on Aug 31, highest $249.99 on Jul 12 over the last 90 days.
Upper Receivers frequently paired with the Aero X15 Stripped Lower – Anodized
Most picked next to it in real builds. Only parts our rules say fit the Aero X15 Stripped Lower – Anodized are listed.
Lower Receivers frequently paired with the PSA Upper 5.56 16" Mid-Length Nitride
Most picked next to it in real builds. Only parts our rules say fit the PSA Upper 5.56 16" Mid-Length Nitride are listed.














