Colt Sporter pre ban Lower, modern upper

[A5scott]

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

[scottryan]

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

[A5scott]

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

[sjc3081]

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.

[Eurodriver]

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.

[djegators]

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?

[scottryan]

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.

[scottryan]

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

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.

[markm]

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.

[djegators]

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.

Good info, thank you.