I got a few pictures of the BCG stripped to show the differences in the parts and the size compared to a 5.56 and other 308 pattern rifles.
The BCG stripped for cleaning. The firing pin retaining pin slot has a very nice recessed slot to protect it.
Firing pin and firing pin spring. Colt says DO NOT remove firing pin spring from the firing pin.
901 bolt with firing pin. You can not tell from this picture but the gas ring on the bolt is one piece.
Front view of the bolt face. Notice how thick and strong the lugs are. This is a heavy duty part and shouts QUALITY. Just like all Colt rifles, the bolt is MP inspected, proof fired and hardened. Not in batches, but every one.
The inside of the carrier still looks clean even after 500 rounds fired with no cleaning or lube.
Massive cam pin.
Here is the charging handle. Notice the ridge, or lip on the bottom rear.
A look up into the upper receiver. If you look close you can see the part added for piston conversion on later models.
Check back for more testing of the 901’s accuracy out to 1000 yards coming up.