Original US Military Buttstock with Trap Door. Used, in good condition.
1960's Vietnam era M16 Buttstocks had fixed Rubber Buttplates (Here)
1970's & 1980's M16A1 models had a Trapdoor. (The Buttstock you are looking at now)
Original Colt M16 part
Made in USA
Under staffed? Customer service 2.5 stars. Ordered grade "A" trap door A1 stock. 5 of 5 stars, used of course, glad to have it.