There's not much left of my 1st get M&P15T at this point (bottom carbine in the picture). The lower receiver, takedown pins (springs and detents), magazine release, bolt catch, fire control group (the stock trigger is the best mil spec AR trigger I've ever encountered), buffer spring, castle nut, the barrel nut, A2 flash hider, and the M&P branded Troy folding battle sights are all that remains.
The receiver extension is now a BCM 7075 aluminum unit.
The buffer is now a Spikes Tactical ST-2.
The receiver end plate is now a VLTOR SASE.
The safety is now a Battle Arms Development 45 degree ambi unit.
The charging handle is now a VLTOR/BCM Gunfighter Mod 4.
The upper receiver is now an Aero stripped upper with BCM parts.
The bolt carrier group is a Spikes Tactical FA unit.
The barrel is a FN pencil barrel, M249 machine gun steel, midlength gas, & double chrome lining.
The gas block BCM low profile unit, gas tube is from BCM.
The rail is a 12" Centurion Arms C4.
The butt stock is a B5 enhanced SOPMOD stock.
Pistol grip is a Magpul MIAD.
Forward vertical grip is a Magpul RVG.
Weapon light is a SureFire G2x.
Light mount is a VLTOR offset scout mount.
Optic is an Aimpoint T1, mounted on an American Defense QD riser mount.
Weight as equipped is 7 lbs, 9 oz.
The top carbine in the picture is almost completely the same as the bottom carbine with only a few differences:
Aero stripped lower receiver.
BCM lower parts kit.
ALG QMS fire control group.
FN modified lightweight profile barrel, otherwise barrel specs are the same as above.
VLTOR low profile gas block.
Front folding Troy Battle Sight has the H&K profile.
Weight as equipped is 7 lbs, 14 oz.