RTG Parts Posted January 7, 2022 Report Share Posted January 7, 2022 Now you can add all the modern conveniences to your Colt SP1 or other Colt Sporter lowers that use the larger .315 inch front pin hole. These big hole flat top uppers are designed with a .315 front pin hole to fit early Colt SP1 and Sporter Lowers. AR15 FLAT TOP BIG HOLE UPPER RECEIVER FOR COLT SP1, $199.95 https://www.robertrtg.com/store/pc/AR15-FLAT-TOP-BIG-HOLE-UPPER-RECEIVER-FOR-COLT-SP1-413p6743.htm Thanks for looking and happy shooting! RTG Parts 931 Frank St. Sheridan, WY 82801 Phone: 307-675-1191 Email: info@rtgparts.com Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.