kBob
Member
Colt SP1 lowers had a different front take down hole than Military contract M-16A1 rifles.
One could not simply drop an upper from a milspec gun onto a SP1 lower without a special adaptor, basically a large plug to fit the SP1 lower with a takedown pin to fit the new upper in an eccentric hole. I may have one around someplace.Opening the gun quickly without lining everything up could damage one or both receiver halfs.
An outfit called Old Sarge advertised parts in the old Shotgun News I believe in the late 1970's as did one of there regular big parts advertisers that had parts for everything under the sun.
I know some folks loath the Sterling AR-180s, but once you fixed the walking trigger and hammer pins they were fine. I staked mine before Sterling offered the long pins with c clips. Biggest issue even when new was magazine availability. Federal marketed some 30s that worked well in the rifles my friends and I had (3 Sterling and a Cosa Mesa) and believe it or not the Ram Line 3 in one worked in them all initially and in AR15s we tried and though they were a tight fit and had to be pulled from the gun in my then owned Mini-14. Unfortunatly after being in storage 25 years they were useless in all three....... neat idea though. A bud tired some of those mags you could store un sprung and slap together for use or use a 40 rounders....they were sort of emmph IIRC. Oh and the reason the four of us all had -180s was we all had bad experiences with service M-16A1s in the early to mid 1970s.
Bushmaster made their Bushmaster Rifle before they made ARs. I think the trigger mech was pretty much AR15. Some were OK and Some were trash. I rather liked the pistol version, somewhat better than the various AR pistols and the Leader (sort of an Ausie -180 offered as a rifle or pistol)
-kBob
One could not simply drop an upper from a milspec gun onto a SP1 lower without a special adaptor, basically a large plug to fit the SP1 lower with a takedown pin to fit the new upper in an eccentric hole. I may have one around someplace.Opening the gun quickly without lining everything up could damage one or both receiver halfs.
An outfit called Old Sarge advertised parts in the old Shotgun News I believe in the late 1970's as did one of there regular big parts advertisers that had parts for everything under the sun.
I know some folks loath the Sterling AR-180s, but once you fixed the walking trigger and hammer pins they were fine. I staked mine before Sterling offered the long pins with c clips. Biggest issue even when new was magazine availability. Federal marketed some 30s that worked well in the rifles my friends and I had (3 Sterling and a Cosa Mesa) and believe it or not the Ram Line 3 in one worked in them all initially and in AR15s we tried and though they were a tight fit and had to be pulled from the gun in my then owned Mini-14. Unfortunatly after being in storage 25 years they were useless in all three....... neat idea though. A bud tired some of those mags you could store un sprung and slap together for use or use a 40 rounders....they were sort of emmph IIRC. Oh and the reason the four of us all had -180s was we all had bad experiences with service M-16A1s in the early to mid 1970s.
Bushmaster made their Bushmaster Rifle before they made ARs. I think the trigger mech was pretty much AR15. Some were OK and Some were trash. I rather liked the pistol version, somewhat better than the various AR pistols and the Leader (sort of an Ausie -180 offered as a rifle or pistol)
-kBob