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Thread: "SLICKSIDE" Colt USAF Model 604 clone build

  1. #1
    imarangemaster's Avatar
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    "SLICKSIDE" Colt USAF Model 604 clone build

    I had sold my prototype build, and my KISS Carbine just didn't seem AR15ish enough for this 63 year old guy. The slick side Colt 601, 602, 603, and SP1 were the AR15 platform as Eugene Stoner and his team intended when they started on it in 1957, releasing the 601 in 1960/1961.

    Retro's are hugely popular (and expensive). People out of state are buying SP1s for $1200, and parting them out, sell parts to retro guys, and lowers to East Coast pre-ban guys for obscene profits. an SP barrel will sell for $400-$450! Uppers receivers are selling for $250 and up.

    Fortunately, a person can build a retro carbine entirely from new parts, and a retro rifle from new parts, except the furniture. (buttstock, triangular handguards, and A1 pistol grip) Even flat slip rings, early port doors and A1 rear sights are being reproduced (though it is usually easier to find an original than a DPMS or Fulton Copy) Nodak Spud, Fulton Armory, and Brownells make retro upper receivers, and Nodak, Brownell's , and McKay (occasionally) make retro lowers. Green Mountain, AR15Sport.com, and others make the barrels.

    With that said, I want to build a slick side 604 clone, using all new parts, except the furniture. I had a spare Anderson A2 lower, so I used it. I am not that much of a purist that I want to wait 6 months or pay a couple hundred more for an A1 lower.

    I found NOS original furniture for around $100. Though Fulton has new flat slip rings, I happened across a NOS USGI one for $15. Here are the pictures: I will post a parts list later tonight.

    Here it is with some of my collection (some of which goes back to my Army and Air Force days in the 70s!) Three of the Colt 20 rounders are permanently blocked at 10 rounds to use with the retro. The others I use in my "Featureless" KISS carbine.












  2. #2
    imarangemaster's Avatar
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    Parts List:

    -new Fulton Armory 604 "slickside" upper with Colt A1 NOS rear sight installed, from private party
    -Anderson A2 lower
    -AR15Sport.com 20" A1 pencil barrel, 1/9" twist with M4 feed ramps
    -AIM Surplus Nickel Boron (poor mans chrome) bolt carrier group
    -DPMS gas tube, lower receiver extension (buffer tube), spring and buffer
    -Stag Arms lower parts kit, weld spring, snap ring, port door
    -NOS Colt USGI triangular handguards
    -NOS Colt Type "D: stock (pre1967) without trap door
    -NOS A1 grip with USAF emblem inset (something I made up 30 years ago for a project)
    -NOS Canvas M1 Sling USGI off E-bay
    -Type II three prong flash hider and front sling swivel from Innovative Industries
    -NOS A1 front sight set from my parts box
    -NOS Colt flat slip ring off E-bay

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    Roger Davis's Avatar
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    Very nice looking rig you have there. The Anderson looks like it belongs there and will perform just as well as the original. Roger.
    Navy Chief (Retired)

  4. #4
    Planning's Avatar
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    I really do like it.
    I agree with the Anderson lowers on them.
    I started using them on my retro rifles until I can get some NDS lowers to swap out, But I like the look and may just leave them as they are.

    I have some I put together several years ago with NDS lowers.
    I seldom get them out, Too much trouble just to look at them. I have never shot them.

    I was looking at your mags and today we were moving boxes and I found several boxes with early mags in them.
    I use to pick them up at gun shows cheap but I didn't try to sell them. Just stored them all these years.
    I figured I would refinish them some day, but now they are worth more as they are than refinishing them.
    I don't have any plans to sell any of them at this time.
    31B

  5. #5
    imarangemaster's Avatar
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    P, I LOVE my 20s.... I have a couple of the boxed sets (7 new Adventureline 20s in a factory box)that I leave in the boxes. I have seven or eight 20s that I use in my featureless build KISS carbine, , and three 20s blocked to 10 rounds for the evil bullet buttoned retro. It would be blasphemy to run the retro "featureless". It would ruin the looks.

  6. #6
    Buckshot's Avatar
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    Got me looking too. My smaller dealer has a Colt A-1 upper on consignment, I may just get it. Nice pictures!
    Occam's razor, the simplest explanation will be the most plausible

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    scottz63's Avatar
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    Beautiful! Great pics as well. I really like the retro 20s. The newer ARs just don't do it for me.
    14EH AIT Instructor-PATRIOT Fire Control Enhanced Operator/Maintainer

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    Great job, love retro rifles. Nice stash of accessories too.

  9. #9
    imarangemaster's Avatar
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    Quote Originally Posted by Buckshot View Post
    Got me looking too. My smaller dealer has a Colt A-1 upper on consignment, I may just get it. Nice pictures!
    Do it! USGI uppers (and SP1 uppers, too) are running $650 to $750 without bolt carrier or charging handle. If it is cheaper than that grab it. Retro stuff is crazy expensive now! 5 years ago, I bought a complete SP1, except stripped lower receiver, for $500!

  10. #10
    imarangemaster's Avatar
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    Thanks guys! I also have a 1956 set up, but didn't want to clutter the picture any more.

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