Not quite....Take ar 15 lowers 1 company makes most lowers.
Manufacturers of AR forgings for lowers (This is an old list)
"LMT = LMT, Lauer(old), DS Arms, PWA, Eagle, Knights Armament, Barrett, Bushmaster (?)
CMT = Stag, RRA, High Standard, Noveske, Century (current), Global Tactical, CLE, S&W, MGI, Wilson Tactical, (some?) Colt, Ratworx
LAR = Grizzly, Bushmaster (L Prefix), Ameetech, (?)DPMS, CMMG, Double Star, Fulton
JVP = Double Star, LRB
MMS = Mega, GSE, Dalphon, POF (forged), Alexander Arms,
Olympic = Olypmic, SGW, Tromix, Palmetto, Dalphon, Frankford, (old) Century
Sun Devil = Sun Devil forged billet receivers
Superior = Superior Arms, Lauer (current)
Grenadier Precision"
JUST A PARTIAL list of Forgers.. Note: I don't know if FNH makes their own forgings.
And...there are other companies that make billet lowers.
So basically CMT Forges Stag, RRA, Noveske, S&W etc. Putting a different Logo on the Lower does not mean that Forger doesnt make Lower's or Upper's for 7 or 8 other AR manufacturers.
Note: Some manufacturers have characteristic machining and/or markings. Such as...
LMT usually leaves forge flash underneath the trigger well, and roughly cuts them between the receiver extension and pistol grip, while leaving a vertical mold flash line on the front lip of the mag well, as well as having other "fingerprint" marks... no bevel cut for the charging handle on the rear lug for the receiver extension, as well as particular mill marks in between the pivot pin tangs. They also have a 'fingerprint' cut in the receiver on the shelf, and below it where the FCG goes. Notice the diagonal mill mark on one of the pivot pin supports. Also unique is the radius in the grip tang pocket, which is not as smooth a transition as the other manufacturers.
And....
Most AR companies use 5 or 6 barrel companies.
Most AR companies use various trigger sources.
Most AR companies use 2 or 3 spring companies.
Most AR companies use various machine shops for BCGs.
Most AR companies use various sources for gas tubes.
Most AR companies use various anodizing shops.
Most AR companies use various LPKs sources.
Most AR companies use various buffers sources.
Most AR companies use various furniture sources.
Most AR companies have their own unique QC methods, customer service, marketing, engineering staff, nepotistic employee arrangements or not, varying philosophies of dedication to customers, understanding of the design and why things are the way they are, etc.
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