Blacklack272,
When you say “lock pins” are you referring to the “push pins” that allow you to break down the rifle into two parts?
The new Colt 6601 and 6601C both use small push pins like everybody else. As a matter of fact, I don’t believe Colt builds a rifle with the older large front pin any longer.
As for the fire control parts, I believe all rifles Colt built for the civilian market use large fire control pins. There are however, several different aftermarket match fire control sets that will fit this weapon. I don’t think Colt blind pins in a sear block in their new lowers any more either. Rather, there is a block that is left in place as part of the machining process.
As for the barrel I don’t believe the civilian models have chrome-lined barrels and that they do have .223 chambers. If you’re going to use the rifle for competitive shooting this would be the better choice.
I don’t know how well suited it would be for triple duty. Match rifles are usually a bit on the heavy side; this might make it a little unwieldy. I also don’t know if there is any real collector value in a new 6601.
That said, it has been my experience that Colt weapons have a great deal on the resale market. If you buy the weapon right you shouldn’t get hosed if you ever have to sell it. Also I think the Colt has great potential as a match rifle OR for home defense. Not both at the same time (just my .02).
I have had the same idea as you for a while now too. I would like to get back into High Power Service Rifle and think the 6601 is the best place to start. I want to start with a 6601, add a floating hand guard, match sights, and a good FCG and go start shooting matches. The factory Colt barrel should be fine for several thousand rounds. When the barrel starts to show a significant amount of wear I’d send it off for a new Krieger barrel. Hopefully I’ll be up to par with the new barrel by then.
For home defense and plinking you might consider an M4 type rifle. It is a smaller and lighter rifle, better suited for such work.
Just my opinion, but I think you’re on track with Colt. I know there are a lot of folks out there who have weapons by other manufactures and they run just fine, but it has been my experience that if you want to start with all the highest quality parts, do yourself and buy a Colt. Not that Colt weapons won’t have their bad days too, but I have yet to see one that won’t run for any other reason than it has been neglected.
I hope some of this helps.
Best Regards, J