Knights Armament KAC SR-15 CQB E3 Mod 2 11.5" M-LOK Upper Receiver Group

Knights Armament CQB 11.5" Upper Receiver Group M-LOK E3

Out of Stock


Knight’s Armament Company, or KAC, is known to many for their top tier, military issued rifles and parts.

Charlie's is proud to offer the Knight’s Armament SR-15 MOD 2 Close Quarter Battle (CQB) complete upper receiver that allow you to easily complete a build or upgrade a rifle with battle proven quality.

Built around a chrome lined, cold hammer forged barrel in 11.5” length with a Mod 2 gas block, and fitted with a KAC 3 prong QDC suppressor compatible flash hider.

The Knight’s Armament SR-15 MOD 2 complete upper receivers feature the URX M-LOK handguards that each have 2 anti-rotation QD sling swivel sockets and even includes a Magpul M-LOK rail cover kit.

On top you’ll find the KAC Micro Front Sight and at the rear the KAC 200-600m micro rear sight that is flip up and adjustable for windage and elevation.

The included bolt carrier group features the E3 bolt that has rounded locking lugs that work in conjunction with the E3 barrel extension.

Also included is an extended latch charging handle.

Some M-LOK furniture and a carbine buffer, matched to the BCG weight and gas system dynamics is also included.


All NFA laws apply.  If you are uncertain if you can own this, check federal National Firearms Act, also with your state authorities.  I am not your lawyer.  You need to make sure you can own it.

Note:  All ITAR regulations apply.  Charlie's deals in the real McCoy.  Your item most likely has parts that cannot be shipped outside of the USA, or owned in the USA by non-US Persons.  You take accountability to safeguard parts and the entire upper, and get necessary approvals to transport outside of the USA. 

Part KM-31963