Does the Harrington & Richardson 635 9mm Lower work with the Foxtrot Mike Products 5" Rear Charging?
Lower Receiver
Harrington & Richardson 635 9mm Lower
from $329.99
Upper Receiver
Foxtrot Mike Products 5" Rear Charging 9mm Upper
from $329.00
Harrington & Richardson lower and Foxtrot Mike Products upper compatibility
Yes, they fit
The Harrington & Richardson 635 9mm Lower works with the Foxtrot Mike Products 5" Rear Charging 9mm Upper. Our compatibility rules found no conflict between them.
No one has built this exact setup yet, but Harrington & Richardson lowers with Foxtrot Mike Products uppers are a common pairing.
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 Harrington & Richardson lower and Foxtrot Mike Products upper
Backed by tens of thousands of qualified builds that have both a lower and an upper.
Share of builds with the Harrington & Richardson 635 9mm Lower and any upper
Harrington & Richardson 635 9mm Lower
- Of lower picks
- 0.1%
- Median paid
- $330
Foxtrot Mike Products 5" Rear Charging
Not in enough builds yet to report.
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 Harrington & Richardson lower and Foxtrot Mike Products upper
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
Bolt Carrier Group
Fits both
Suppressor
Harrington & Richardson 635 vs Foxtrot Mike Products 5" Rear: specs and prices
| Harrington & Richardson 635 | Foxtrot Mike Products 5" | |
|---|---|---|
| Best price | $329.99 at Palmetto State Armory | $329.00 at AR15 Discounts |
| Stores | 1 of 1 in stock | 2 of 2 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 | 5 |
Both for $658.99 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.
- Foxtrot Mike Products 5" Rear Charging: lowest $329.00 on Jul 5, highest $329.00 on Jul 5 over the last 90 days.
Upper Receivers frequently paired with the Harrington & Richardson 635 9mm Lower
Most picked next to it in real builds. Only parts our rules say fit the Harrington & Richardson 635 9mm Lower are listed.
Lower Receivers most paired with Foxtrot Mike Products uppers
The Foxtrot Mike Products 5" Rear Charging is not in enough builds yet, so these are the most picked next to any Foxtrot Mike Products upper. Only parts our rules say fit the Foxtrot Mike Products 5" Rear Charging are listed.
Ke Arms Ke-15 Forged 5.56mm
Fits, check noteCheck fit