Here is a set of the skinny Colt 7 hole 6320 handguards I am going to use. The heat shield is stainless steel, unless I am mistaken. Way too hard for aluminum.
Here's the early Colt Fiberlite stock I bought to put on the 6920. Has the N and 1 under the latch. Got lucky and got it for just over $100. They used them on the early 633s, M4s and Sporter II Lightweight Carbines
While I know they are not original to the 6920, but they are earlier Colt, so its still ALL COLT!