FN-M16A4 uppers/rifle

[Count VonFuhrman]

Came across 2 different type of FN-M16A4 uppers. One describe as such
#NEW Factory Built FN-M16A4 / Barrels have cage Code Number's CHF and are confirmed as ''FN'' - 3S679 - MP 5.56 NATO 1/7

#NEW Upper Receiver has ''F'' ''CERRO''Keyhole'' Forge Marks ''T''mark top ,bright white letter's (Carry Handle '''Square '' forge)

#NEW Knight Armament M5 Rail system /w 8 - different rib size covers / all are KAC cover's /

#NEW FN-M16 Bolt Carrier Group / "f1" Carrier / "MPF" Bolt

#NEW Charge Handle's cage code# 2U136

and one described as FNH Heavy Barrel M16A4 20" Barrel Upper KAC Quadrail.

Has anyone came across this type of upper with this barrel? Does anyone know about the heavy barrel info and markings. Is this a CHF barrel? Thanks

 

[SAMR]

Is one maybe a regular fnar 15a4 and one is a “military collector” model?

 

[Count VonFuhrman]

Thanks for the reply SAMR! I did find out that the M16A4 heavy barrel is marked ''FN'' - 3S679 - MP 5.56 NATO 1/7 same as the govt. contour barrel cold hammer forge. Some of the FN Ar15 barrels are not cold hammer forge.

 

[Primus]

Here is the honest truth. You can't get a real clone from FN commercially. Their military guns are build according to the TDP and they are contractually prohibited from using that information on commerical guns. So unless you score a surplus fn upper/parts you are most likely getting subpar parts. Colt who actually owned/owns the TDP doesn't have to follow the same restrictions. If you want a true clone upper, go colt or scour for a fn surplus upper on the grey market.

 

[Count VonFuhrman]

Primus, Thanks for that reply. There is some M16A4 FN uppers on Gunbroker. Barrels are marked ''FN'' - 3S679 - MP 5.56 NATO 1/7 with
Knight Armament M5 Rail system /w 8 - different rib size covers / all are KAC cover's . Upper Receiver has ''F'' ''CERRO''Keyhole'' Forge Marks ''T''mark top ,bright white letter's (Carry Handle '''Square '' forge). Surplus FN uppers? Take a look and see what you think?

 

[Primus]

Are the barrels marked cmv? That will be a good tell verus 4150.

 

[Count VonFuhrman]

No CMV.