Does the Harrington & Richardson Retro M16A1 work with the Daniel Defense M4A1 FSP 14.50"?
Lower Receiver
Harrington & Richardson Retro M16A1 Lowers Receiver
from $159.99
Upper Receiver
Daniel Defense M4A1 FSP 14.50" Carbine-Length Upper
from $1506.00
Harrington & Richardson lower and Daniel Defense upper compatibility
Yes, they fit
The Harrington & Richardson Retro M16A1 Lowers works with the Daniel Defense M4A1 FSP 14.50" Carbine-Length. 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 Harrington & Richardson lower and Daniel Defense upper
Backed by tens of thousands of qualified builds that have both a lower and an upper.
Share of builds with the Harrington & Richardson Retro M16A1 and any upper
Share of builds with the Daniel Defense M4A1 FSP 14.50" and any lower
- This pairHarrington & Richardson Retro M16A1 Lowers33%
Harrington & Richardson Retro M16A1
- Of lower picks
- 0.1%
- Median paid
- $160
Daniel Defense M4A1 FSP 14.50"
- Of upper picks
- 0%
- Median paid
- $1506
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 Daniel Defense upper
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Pistol Grip
Barrel
FN America FN 16 Mid-Length 5.56mm
Fits both
Charging Handle
Fits both
Muzzle Device
Bolt Carrier Group
Handguard
Stock & Brace
Harrington & Richardson Retro vs Daniel Defense M4A1 FSP 14.50": specs and prices
| Harrington & Richardson | Daniel Defense M4A1 FSP | |
|---|---|---|
| Best price | $159.99 at Palmetto State Armory | $1506.00 at Palmetto State Armory |
| Stores | 0 of 1 in stock | 6 of 6 in stock |
| Assembly | Stripped | Complete |
| Platform | AR-15 | AR-15 |
| Caliber | 5.56 NATO | 5.56 NATO |
| Color | Gray | n/a |
| Gas System Length | n/a | Carbine |
| Length | n/a | 14.5 |
Both for $1665.99 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 Retro M16A1: lowest $159.99 on Sep 4, highest $159.99 on Sep 4 over the last 90 days.
- Daniel Defense M4A1 FSP 14.50": lowest $1506.00 on Jul 12, highest $1629.00 on Aug 2 over the last 90 days.
Upper Receivers frequently paired with the Harrington & Richardson Retro M16A1
Most picked next to it in real builds. Only parts our rules say fit the Harrington & Richardson Retro M16A1 are listed.
Lower Receivers most paired with Daniel Defense uppers
The Daniel Defense M4A1 FSP 14.50" is not in enough builds yet, so these are the most picked next to any Daniel Defense upper. Only parts our rules say fit the Daniel Defense M4A1 FSP 14.50" are listed.
