Equipment Exchange

im trying to get my first m4a1 block II colt clone up and running and bought an fsp version at local gunshow thinking i could just pull the rail. my barrel and rail are married due to a perfect pin and weld job done at the flash hider by d. wilson. i had no idea i couldnt just swap the rail for later version easily when i bought this thing days ago. apparently the fsp version rail was not designed to pop on and off easily which i didnt know about.

heres what i have to be rid of. build parts listed below.

colt m4a1 socom heavy barrel assy. with fsb and cage code era markings like new,
surefire 3 prong model sf3p like new with pin and weld job done by d. wilson which cost the original builder 60 bucks i think it was just to have pinned.
daniel defense fde ris II black creek address marked proper fsp type rail like new, very minor mounting marks where i mounted a QD larue sbrm bipod and m640df flashlight and took back off. original builder barely touched it looks like.
late colt cage code marked on underside charging handle assy excellent cond.
colt square forge marked upper with m4 ramps and m4 rollmark stamp above gas tube hole but mysteriously missing any cage code or c marking. builder said it came from a colt late gun his police dept had laying around so i didnt argue with him. it does look like my colts right down to the m4 roll stamp but just be aware i couldnt see any cage code anywhere.
if you need a rear buis or colt bcg i have plenty of options too many to mention so with or without no big deal.

all i need is a colt m4a1 block II NON FRONT SIGHT BASE type upper or parts for such in trade that i can continue my build unhindered. can be new or used salty ill build one of each once i gather more parts. thanks for looking. please let me know what you have.