Does the Harrington & Richardson 635 9mm Lower work with the Stern Defense 9mm Upper?
Lower Receiver
Harrington & Richardson 635 9mm Lower
from $329.99
Upper Receiver
Stern Defense 9mm Upper
from $534.45
Harrington & Richardson lower and Stern Defense upper compatibility
Yes, they fit
The Harrington & Richardson 635 9mm Lower works with the Stern Defense 9mm Upper. 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.
Harrington & Richardson 635 vs Stern Defense 9mm Upper: specs and prices
| Harrington & Richardson 635 | Stern Defense 9mm Upper | |
|---|---|---|
| Best price | $329.99 at Palmetto State Armory | $534.45 at Optics Planet |
| Stores | 1 of 1 in stock | 1 of 1 in stock |
| Assembly | Complete | Complete |
| Platform | AR-9 | AR-9 |
| Caliber | 9mm | 9mm |
| Trigger Pin | .154 | n/a |
| Color | Black | n/a |
| Gas System Length | n/a | Blowback |
| Length | n/a | 16 |
Both for $864.44 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
- Harrington & Richardson 635 9mm Lower: lowest $329.99 on Jul 12, highest $329.99 on Jul 12 over the last 90 days.
- Stern Defense 9mm Upper: lowest $445.78 on Jul 5, highest $534.45 on Jul 15 over the last 90 days.