Found this item and I am not sure what length barrel it is meant for. model 1 sales has a shorty triangle in their latest ad; but shows it available on the 11.5" + 5.5" slotted weld on-flash hider. Will these only fit that configuration or will they fit m-r or CAR 16" models?
NDS-35 Carbine length triangle handguards
Manufactured by Tony's Custom Uppers, these high quality "A1" style handguards give your carbine a distinctive "Retro" flavor.
They require installation of a rifle style triangular cap (.750" barrel diameter version included) on your carbine barrel.
This necessitates removing your front sight base.
http://i176.photobucket.com/albums/w181/jonrw/shorty.jpg
Also, are the XM 177 problematic in that they are too short to reliable cycle ammo> I was getting this from another post. I like the look of them, not sure of how I'd best make use of it though.
Ed