- Mil-Spec M-4 Upper receiver with ceramic finish
- Black Phosphate 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
- Numerous upgrades available
Reduce your AR shooting costs with the CMMG Upper Complete Sierra .22 LR 16 inch and your existing lower receiver. The Mil-Spec M-4 upper receiver has a ceramic finish and a black Phosphate action. Chambered for the .22 Long Rifle cartridge, which costs much less than 223 ammo, the Sierra Complete Upper delivers plenty of shooting action. 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 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 or upgrades that you wish to add and speaking of upgrades there are a bunch you can have to make the perfect shooting rifle.
SPECS: Mil-Spec M-4 upper receiver with ceramic finish, black phosphate 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, numerous upgrades available.