Compared on builder picks, today's prices and specs.
Our pick: the builders' favorite

Builders pick it 6 to 1 over the Colt 14.5".
$1,544.00at Primary Arms, in stock
Builders pick the Daniel Defense 14.5" 5.56 M4A1 Upper 6 to 1 over the Colt 14.5". It is in 2.6% of GunPartPicker builds that have an upper receiver, against 0.4% for the Colt 14.5". It is in stock today from $1,544.00 at Primary Arms; the Colt 14.5" is not.
Builders paid a median $1,544.00 for it when they added it, against $943.09 for the Colt 14.5". On paper they differ on caliber (5.56 NATO against .223 Wylde). It is most often built with the Geissele Automatics SSA-E X and the EOTECH 3x30.5mm X 21.6mm.
Builders pick the Daniel Defense 14.5" 5.56 M4A1 Upper 6.3 to 1.
Shares come from GunPartPicker's build data: real parts lists people put together while planning a purchase, not sales. Slot share is the share of builds with a upper receiver that chose this one. Median paid is the price shown when builders picked it, not today's price; the table below has today's prices.
| Spec | ![]() | ![]() |
|---|---|---|
| Lowest in stock | Out of stock | $1,544.00Primary Arms |
| Stores in stock | None today | 1 |
| Assembly | Complete | Complete |
| Platform | AR-15 | AR-15 |
| Gas System Length | Not listed | Carbine |
| Caliber | .223 Wylde | 5.56 NATO |
| Length | 14.5 | 14.5 |
| Actions |
Every store we track for each part, cheapest in stock first. Prices are checked through the day.