Quarter Circle 10
Quarter Circle 10 9mm Complete AR15 Lower & Upper w/ Maxim CQB - Glock pattern
Warning: Last items in stock!
Colt Pattern Quarter Circle 10 billet lower GSF
Glock magazine in photo NOT included.
UPPER RECEIVER: MUR-PISTOL-UPPER
The Quarter Circle 10 Pistol MUR is a highly rigid upper receiver designed specifically for pistol-caliber AR builds. Our upper receiver design is derived from the operator-quality VLTOR MUR receiver, and with the help of VLTOR engineers and our pistol caliber expertise, we’ve brought you the only possible choice for a dedicated pistol-caliber build.
The Pistol MUR is constructed to mil-spec standards, but adds a thicker receiver wall for increased rigidity and strength in blowback operation. This sturdier design contributes to increased accuracy and reliability, extends the life of interfacing components, and is a perfect aesthetic match to our lower receivers. These are slick-side uppers, reducing weight and complexity by doing away with the superfluous forward assist. Furthermore, the QC10 Pistol MUR has a redesigned ejection port engineered with wider pistol cartridge cases in mind.
Now, you can build your pistol-caliber platform with the peace of mind of knowing that every component is of the highest quality. Whether for home-defense, law enforcement, competition, or plinking, Quarter Circle 10 has you covered, with our philosophy of Made For- Not Modified. Each of our parts is engineered and manufactured with pistol calibers in mind, rather than modified from rifle-caliber components as an afterthought. We’re Quarter Circle 10, the AR Pistol-Caliber brand.
Not quite what you are looking for? Let us know, we can usually accomodate special requests. We can also do this in FDE -- FDE grip, FDE Maxim stock, and FDE Talon selector.