Hey,
the Colt sporter lower, It was built so it couldn’t be converted to full auto, or at least not easily… and that’s fine. I want to put a newer upper on it, and was curious what to do about that hunk of metal above the safety selector, because it prevents the BCG from cycling. Cut it flush to the receiver? drill that pin and pop the piece out and put a newer safety selector in there?
anybody have experience with this?
thanks
scott
You need to send the lower to specialized armament to get the sear block reduced.
The pin holding it in can’t be removed without destroying the lower
so this isn’t something that a machinist can do? or is it a legal issue to have a machinist reduce the block?
thanks again
scott
Cut the sear block flush to the lower with a dremel. It isn’t pretty but it is fast,cheap and 100% functional with a full auto BCG.
If he’s a machinist, I think he has something a bit better than a dermal.
I think ADCO does this service, and they have an excellent reputation.
For my own edification, I assume you have this pre-ban lower because you live in a ban state…do the laws there address you modifying the lower in this manner or not?
Adco uses a dremel tool on these and does a shitty job on them.
It is not illegal to remove the block.
You need to send it to specialized armament. They are the only people that know how to do this correctly.
They are colts custom shop for Ar15s.
The block reduction requires a carbide mill.
I don’t want to repeat this information again. You have been warned.
Don’t put your high dollar lower at risk.
SAW did Pappabears, and it is gorgeous. If you like the gun and want it to look factory, SAW is the way to go.
He mills it flat and finishes it. Worth the $75 or whatever he charges if you want a professional looking job that you really won’t notice when you look into the lower.
Good info, thank you.
In my opinion $75.00 plus shipping is to much. You can buy a high quality stripped lower for less money.
This comment is retarded.
A preban lower costs between $500 and $1500
The sear blocks are installed in preban lowers.
A quality stripped post ban lower does not cost $75
True. You can finish that lower off with some model 1 and del ton parts and have a nice retro gun. :sarcastic:
At one time pre 94 lowers were worth 10 times that in some states?? GH
Please don’t comment unless you have something to add that is beneficial. This one wasn’t.
Good info already posted, but there is another route to consider. If your goal is to run a decent BCG that isn’t the old Sporter style (neutered tail section and exposed firing pin) you can use a semi-auto carrier. You just need to ensure that the tail section is relieved enough (not FA profile) so that it does not contact the block.
Sporter carrier (one version)
block
6520 rehabbed with CMT semi-auto carrier
This is one off the three lowers I did with a POS dremel it took 15 minutes. Two pics are the same lower flash and no flash Iphone pics.
Advice was given, do what you want. I would want it done professionally considering the value it has.
Why would you take a dremel to an increasingly rare and expensive lower?
Get it professionally done.
I can post a pic of Specialized’s work for comparison if necessary. It would have to be after work though.