Does the Smith & Wesson M&P15 Lower work with the Colt M4/M4A1 Replacement Stripped 14.5in?
Lower Receiver
Smith & Wesson M&P15 Lower 5.56x45mm/.223 Remington
from $269.99
Barrel
Colt M4/M4A1 Replacement Stripped 14.5in
from $249.99
Smith & Wesson lower and Colt barrel compatibility
Yes, they fit
The Smith & Wesson M&P15 Lower 5.56x45mm/.223 works with the Colt M4/M4A1 Replacement Stripped 14.5in. 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.
Smith & Wesson M&P15 Lower vs Colt M4/M4A1 Replacement: specs and prices
| Smith & Wesson M&P15 Lower | Colt M4/M4A1 Replacement | |
|---|---|---|
| Best price | $339.20 at Classic Firearms | $249.99 at Brownells |
| Stores | 4 of 6 in stock | 0 of 1 in stock |
| Assembly | Complete | n/a |
| Platform | AR-15 | n/a |
| Caliber | 5.56 NATO | 5.56 NATO |
| Color | Black | n/a |
| Gas System | n/a | Carbine |
| Length | n/a | 14.5 |
| Twist | n/a | 1:7 |
| Contour | n/a | M4 |
Both for $589.19 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
- Smith & Wesson M&P15 Lower: lowest $269.99 on Jul 11, highest $420.99 on Sep 26 over the last 90 days.
- Colt M4/M4A1 Replacement Stripped 14.5in: lowest $249.99 on Jul 6, highest $249.99 on Jul 6 over the last 90 days.