Product Details
Finally, a modern flat top upper made specifically for Colt SP1, or other Colt Sporters, with a larger than standard front pin hole.
These "big hole" flat top uppers are designed with a .315 front pin hole and will work with all Colt SP1 and Colt Sporter Lowers that use this larger pin.
Product Notes:
* Made from a 7075-T6 aluminum forging
* Mil-Spec hardcoat anodized Colt Grey. A great match for Colt lowers.
* .315 front pin hole that fits early Colt lowers and the SP1.
* Picatinny Rail
* M4 Feed Ramps
* Weight: 6.9 ounces
