Originally manufactured by Olympic Arms as a semi-automatic rifle, and then upgraded by John Benjamin to a selective fire assault rifle. The upper receiver is A4 pattern, with a cylindrical forearm concealing the silencer and fitted with rails at 12, 3 and 9 o'clock. The upper is fitted with a Swan Sleeve rail riser with an A.R.M.S. backup iron sight, NEPVS14-17 night vision unit, and an L3 EOTech red dot sight. The lower has the standard Olympic markings and a USMC emblem on the left side, with "JCB" added to the serial number and "AUTO" to the now functional 3rd selector position, with a checkered pistol grip and 4-position telescoping buttstock.

Very fine as upgraded to full auto, with 90% of the anodized blue/matte black finish, with mild handling marks overall. Mechanically needs adjustment. Optics are in good order. NOTE: This weapon is a National Firearms Act (NFA), fully transferable Class 3, which is registered with the Bureau of Alcohol, Tobacco, Firearms and Explosives, (BATFE) under the provisions of 18 U.S.C. Chapter 44 and 27 CFR part 479.

Constructed from stainless steel, with a threaded front cap, internal expansion space, and a short section of rifled 30 caliber bore at the end. 8 inches overall, enclosed by the forearm when assembled.

Excellent, with mild handling marks. Appears to be in good order. NOTE: This Silencer is a National Firearms Act (NFA), fully transferable Class 3, which is registered with the Bureau of Alcohol, Tobacco, Firearms and Explosives, (BATFE) under the provisions of 18 U.S.C. Chapter 44 and 27 CFR part 479, National Firearms Act.