Colt 601 Build

[RCS]

I had some original "green" color furniture and installed it on an early four digit Colt SP1 semi auto sporter- sort of a fake 601. Added an original triangular charging handle too and early bolt catch

[Sapper740]

Jim,
Out of curiosity what is "Fibrite"...? it's not fiberglass - the examples I see of some originals it looks like molded "Masonite". (My handguards appeared to be fiberglass after sanding them down a bit.)

My understanding, and this is decades old is that fibrite was made from a long fiber polymer. Colt was experimenting with various materials for the M16's furniture and experimented with acetate covered aluminum as found in the CAR 15 telescopic stock and Bakelite in the pistol grip. Fibrite wasn't as strong as required and was eventually replaced by foam filled nylon. There's lots of good info here: Variations in Early AR-15/M16 Rifle Buttstocks - Armament Research Services (ARES)

[browningautorifle]

a long fiber polymer.

That would follow what I remember from the looks of it. Mine weren't shredded or broken so I had no exposure to it's makings. Those acetate covered aluminum butts were also what we started with on the C8 carbines. Although I started off liking them, once I carried the polymer models a bit the weight was evident.

[Madcap]

Thank you, guys, for the previous info. The SP1 with the and green furniture really has a unique presence.

I've been waiting on an SP1/M16 buttstock to be mailed for over two weeks from a seller on GB and was pretty sure it would go out this week but no joy so far.

A friend is a civ USAF armorer and took some photos of an original Colt Armalite "01" if anyone would like, I'll post them.

Thanks again,

Dick

[Madcap]

The buttstock has shipped - trk shows arriving tomorrow. Soon I can look it over and evaluate the conversion process I'll post some photos. I think I also managed to get lucky and score an original Edgwater Buffer from Amherst Mil Depot - the last one they had for $150....not too bad in comparison from what I've seen if available anywhere else. They're photo looked very good if it's accurate.

[Madcap]

The buttstock arrived this morning and looks very good. The sling swivel was removed and the stock lightly sanded with 180 and 220 W/D.

The tab that inserts into the receiver has a hole with some sort of material that I assume was stuck in there for some reason and I'm confused as to what it is or the purpose.
Photos attached are the best description...anyone also know what the purpose was for the hole??

edit:
Help...! The realization has struck me that I'm not sure where the detent spring for the takedown is supposed to go on this stock....is this the wrong stock for a 601?? Something doesn't seem to make sense.

Dick

[browningautorifle]

the detent spring for the takedown

Goes off center. Don't sweat, you're fine.

[Madcap]

Goes off center. Don't sweat, you're fine.

Jim, do you mean the spring is inserted into that hole in the tab...? What's that thing I picked out of the hole?
Thanks for your help.

[browningautorifle]

the spring

No they go off center in a hole and are retained by the flat surface. Don't know what that center hole is. I had an early test model Colt, and the assembly wasn't any different than later models. Just no fence and markings are different. That projection keeps the butt from turning in the receiver.

[Madcap]

No they go off center in a hole and are retained by the flat surface. Don't know what that center hole is. I had an early test model Colt, and the assembly wasn't any different than later models. Just no fence and markings are different. That projection keeps the butt from turning in the receiver.

You must mean the hole offset in the end of receiver where the detent spring inserts, and protrudes out then just rides flush against the end of the stock...correct? I mistakenly thought there was a shallow hole on the later stocks that helped to index and hold that detent spring. I think I confused myself, but think I finally get it now.
Thanks for your help once more - always appreciated.