5.5" BufferLess 9mm Complete Upper Kit

Product Description

BufferLess Self-contained blowback upper that works on Mill spec AR-15 and 9mm uppers.

The MCS Complete 9mm Upper fits most AR-15/AR-9 Lowers. This upper features a 5.5-inch barrel crafted from 4140 steel with a black nitride finish. The billet aluminum upper receiver is hard coat anodized to maximize its strength and durability.

Blowback 9mm AR upper receiver, with NO BUFFER!

Compatible with any AR-15* and/or AR-9 lower (magazines for Glock 17 & 19 OR Sig Sauer P320), this upper gives shooters endless build possibilities while being compact and versatile.

Solid end receiver does not require a buffer

•          Hard anodized billet aluminum
•          5.5'' barrel, 4140 Nitrided
•          threaded barrel
•          Full length integral picatinny rail for installing optics or sights
•          3.5'' bottom picatinny accessory rail
•          Non-reciprocating charging handle can be used on right or left side
•          4140 steel nitrided bolt & trunnion for durability
•          No tools required for field stripping
•          OAL: 12.125, Width: 1.47, Weight: 3.5lbs

*AR-15 lowers will require a 9mm magwell adapter to accept 9mm pistol magazines. We recommend using a standard AR-15/AR-9 trigger system, and not binary or FRT triggers.  We do not recommend running this upper in full auto.

Glock Magazine Magwell Adapter

The Magazine adapter allows you to use your pistol magazines in any AR-15 milspec lower – the ultimate PCC-pistol combination for Glock

Fits any standard AR-15 lower receiver.
No modifications required to your lower or magazine.
Installs in seconds.
Built-in magazine release.
Locks into place with the standard AR-15 catch.
Lightweight aircraft-grade aluminum construction; anodized finish.
Steel ejector and magazine catch.

*Only compatible with mil-spec AR-15 lower receivers, combined with a 9mm upper with a Glock-cut bolt.

*No last round bolt hold open.

*Hand-fitting may be required with FM-9 uppers.

*The adapter will not work with the CMMG Radial Delayed Blowback.