Does the PSA Lower 300BO work with the Troy Industries Billet?
Palmetto State Armory lower and Troy Industries upper compatibility
Yes, they fit
The PSA Lower 300BO works with the Troy Industries Billet. 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 Palmetto State Armory lower and Troy Industries upper
Backed by tens of thousands of qualified builds that have both a lower and an upper.
Share of builds with the PSA Lower 300BO and any upper
- This pairTroy Industries Billet13%
Share of builds with the Troy Industries Billet and any lower
- This pairPSA Lower 300BO33%
PSA Lower 300BO
- Of lower picks
- 0.1%
- Median paid
- n/a
Troy Industries Billet
- Of upper picks
- 0%
- Median paid
- n/a
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 Palmetto State Armory lower and Troy Industries upper
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Charging Handle

Radian Raptor & Talon Safety Selector Combo
Unconfirmed
Handguard
Stock & Brace
Muzzle Device
Barrel
Gas Block
PSA Lower 300BO vs Troy Industries Billet: specs and prices
| PSA Lower 300BO | Troy Industries Billet | |
|---|---|---|
| Best price | n/a | $114.99 at Primary Arms |
| Stores | n/a | 0 of 1 in stock |
| Assembly | Complete | Stripped |
| Platform | AR-15 | AR-15 |
| Caliber | 300 Blackout | n/a |
| Trigger Pin | .154 | n/a |
| Color | FDE | n/a |
| Receiver Type | n/a | Slick Side |
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.
PSA Lower 300BO
No store lists it today.
Troy Industries Billet
- Primary Armsout of stock$114.99
Price history, last 90 days
- Troy Industries Billet: lowest $114.99 on Jul 7, highest $114.99 on Jul 7 over the last 90 days.
Upper Receivers frequently paired with the PSA Lower 300BO
Most picked next to it in real builds. Only parts our rules say fit the PSA Lower 300BO are listed.
Lower Receivers most paired with Troy Industries uppers
The Troy Industries Billet is not in enough builds yet, so these are the most picked next to any Troy Industries upper. Only parts our rules say fit the Troy Industries Billet are listed.




















