BlakeW Posted June 7, 2016 Report Share Posted June 7, 2016 Colt AR-15 Machine Gun. Model SP1. 4 position selector switch (safe, semi, 3 shot burst, full auto). Adjustable stock, fixed sights, i.e. with original furniture. Fully civilian transferable!! $23K Link to comment Share on other sites More sharing options...
Extraparts7 Posted June 7, 2016 Report Share Posted June 7, 2016 Do you know who did the conversion? Should be listed on the F-4. Can you post a pic of the conversion maker's stamping(s)? Thanks, Kent Link to comment Share on other sites More sharing options...
BlakeW Posted June 7, 2016 Author Report Share Posted June 7, 2016 The conversion was done by RPB Industries, Inc. But they did not stamp the firearm as far as I'm aware, I could dig it out of the safe and check again, but I fairly certain it isn't stamped. Let me know if there is anything else I can help you with. Link to comment Share on other sites More sharing options...
pstidan Posted June 7, 2016 Report Share Posted June 7, 2016 The RPB markings may be under the grip. Link to comment Share on other sites More sharing options...
BlakeW Posted June 7, 2016 Author Report Share Posted June 7, 2016 Thanks, I'll take a look when I have a chance to remove grip, and then I'll post a picture of anything I find. Link to comment Share on other sites More sharing options...
Famester Posted June 8, 2016 Report Share Posted June 8, 2016 (edited) You can look thru the vent holes on the underside of the barrel Edited June 8, 2016 by Famester clarify Link to comment Share on other sites More sharing options...
Hammertime Posted June 8, 2016 Report Share Posted June 8, 2016 Push Pin Upper very early org. COLT 614 with a DPMS four pos fire control ! Link to comment Share on other sites More sharing options...
BlakeW Posted June 8, 2016 Author Report Share Posted June 8, 2016 Thanks for the info Famester and I appreciate the good words Hammertime!!! Link to comment Share on other sites More sharing options...
jjrphs Posted June 8, 2016 Report Share Posted June 8, 2016 8 hours ago, Hammertime said: Push Pin Upper very early org. COLT 614 with a DPMS four pos fire control ! ??? The Colt pictured in this thread is not a Colt factory AR15 Model 614. It is clearly marked "SP1" on the mag-well, fire control markings are only "Safe" & "Fire" and the owner states it's an RPB conversion. Link to comment Share on other sites More sharing options...
philasteen Posted June 8, 2016 Report Share Posted June 8, 2016 It also has the large front pivot pin. Link to comment Share on other sites More sharing options...
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