Does the Harrington & Richardson M16A1 Lower GI work with the Harrington & Richardson Retro M16A1 20"?
Lower Receiver
Harrington & Richardson M16A1 Lower GI Quality Trapdoor
from $389.99
Upper Receiver
Harrington & Richardson Retro M16A1 20" Upper 5.56 1:12
Harrington & Richardson lower and Harrington & Richardson upper compatibility
Yes, they fit
The Harrington & Richardson M16A1 Lower GI Quality works with the Harrington & Richardson Retro M16A1 20" Upper. Our compatibility rules found no conflict between them.
No one has built this exact setup yet, but Harrington & Richardson lowers with Harrington & Richardson 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 Harrington & Richardson upper
Backed by tens of thousands of qualified builds that have both a lower and an upper.
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 Harrington & Richardson upper
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Harrington & Richardson M16A1 vs Harrington & Richardson Retro: specs and prices
| Harrington & Richardson | Harrington & Richardson | |
|---|---|---|
| Best price | $389.99 at Palmetto State Armory | n/a |
| Stores | 1 of 1 in stock | n/a |
| Assembly | Complete | Complete |
| Platform | AR-15 | AR-15 |
| Caliber | 5.56 NATO | 5.56 NATO |
| Trigger Pin | .154 | n/a |
| Color | Gray | n/a |
| Gas System Length | n/a | Rifle |
| Length | n/a | 20 |
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.
Harrington & Richardson M16A1 Lower GI Quality
- Palmetto State Armory$389.99
Harrington & Richardson Retro M16A1 20" Upper
No store lists it today.
Upper Receivers most paired with Harrington & Richardson lowers
The Harrington & Richardson M16A1 Lower GI is not in enough builds yet, so these are the most picked next to any Harrington & Richardson lower. Only parts our rules say fit the Harrington & Richardson M16A1 Lower GI are listed.
Tacfire 10" Upper 9mm 1:10
Fits, check noteCheck fit
PSA GEN4 8" 9mm 1/10 Suppressor Ready 10" M-LOK Upper
Fits, check noteCheck fit
Lower Receivers most paired with Harrington & Richardson uppers
The Harrington & Richardson Retro M16A1 20" is not in enough builds yet, so these are the most picked next to any Harrington & Richardson upper. Only parts our rules say fit the Harrington & Richardson Retro M16A1 20" are listed.
