- Mil-Spec M-4 Upper receiver with ceramic finish
- Stainless Steel action
- .22 Long Rifle caliber
- 16 inch W.A.S.P. carbon steel barrel
- 1 in 16 inch twist
- Mil-Spec 1/2 X 28 threaded muzzle with A1 flash hinder
- Picatinny railed low profile front sight base
- Live round extraction
- Anti-jam charging handle
- Low profile single rail gas block
Having a dedicated training upper receiver like CMMG Upper Complete Sierra .22 LR 16 Inch SS Action just makes sense and when it saves you ammunition costs, it makes dollars and cents. The Mil-Spec M-4 upper receiver has a ceramic finish and a Stainless Steel .22 Long Rifle caliber action for many years of trouble free and cost effective shooting. Made of carbon steel the 16 inch W.A.S.P., barrel has a 1 in 16 inch twist, a Mil-Spec 1/2 X 28 threaded muzzle and an A1 flash hinder. W.A.S.P. is a finishing process that is more abrasion and corrosion resistance than hard chrome or phosphate finishes giving you years of shooting fun. There is a Picatinny railed low profile front sight base that will fit any AR style low profile sight that you want to attach. The live round extraction feature helps with functioning drills and the anti-jam changing handle keeps stoppages to a minimum. A low profile single rail gas block won't get in the way of any optics that you wish to add.
AR-15, Issue:10, Page:104
Big Book Catalog, Issue:68, Page:009
SPECS: Mil-Spec M-4 upper receiver with ceramic finish, stainless steel action, .22 Long Rifle caliber, 16 inch W.A.S.P. carbon steel barrel, 1 in 16 inch twist, Mil-Spec 1/2 x 28 threaded muzzle with A1 flash hinder, Picatinny railed low profile front sight base, live round extraction, anti-jam charging handle, low profile single rail gas block.