QUARTER CIRCLE 10

Quarter Circle 10 is a family and female-owned company dedicated to producing high quality firearms.
Current AR-15 style pistol, rifle, and parts manufacturer located in Tucson, AZ, with headquarters in Dripping Springs, TX.
QUARTER CIRCLE 10 logo

QUARTER CIRCLE 10 Firearms Models

QC5 9MM RIFLE Image

QC5 9MM RIFLE

9mm Para. cal., 16 in. barrel, 30 shot MP5 mag., Mil-Spec lower parts, Magpul MOE collapsible stock, QC10 milled billet aluminum rear or non-reciprocating side-charging upper and lower receiver, Picatinny rail, M-LOK handguard, Type III har...

QC5 9MM AR PCC SIDE-CHARGING/REAR-CHARGING Image

QC5 9MM AR PCC SIDE-CHARGING/REAR-CHARGING

9mm Para. cal., 5 1/2, 7 1/2, or 10 1/2 in. barrel, MP5 mag., Mil-Spec parts, SB Tactical A3 or PDW brace, milled billet aluminum rear or side-charging upper and lower receiver, Picatinny rail, M-LOK (side-charging) or KeyMod (rear-charging...

Big Tex (GLF) Image

Big Tex (GLF)

.45 ACP cal., 16 in. barrel, Glock 21 mag., Mil-Spec lower parts, Magpul MOE collapsible stock, QC10 milled billet aluminum rear or non-reciprocating side-charging upper and lower receiver, Picatinny rail, M-LOK handguard, Type III hardcoat...

Big Tex (GLF) Image

Big Tex (GLF)

.45 ACP cal., 5 1/2, 7 1/2, or 10 1/2 in. barrel, double stack Glock mag. compatible, Mil-Spec parts, SB Tactical A3 or PDW brace, QC10 milled billet aluminum rear or side-charging (non-reciprocating) upper and lower receiver, Picatinny rai...

Ranger (GSF) Image

Ranger (GSF)

.40 S&W or 9mm Para. cal., 16 in. barrel, 33 shot Glock mag., Mil-Spec lower parts, enhanced Mil-Spec trigger, Magpul MOE grip stock, ambi safety selector, QC10 milled billet aluminum rear or non-reciprocating side-charging upper and lower...

Blu Whistler (P320) Image

Blu Whistler (P320)

9mm Para. cal., 5 1/2, 7 1/2, or 10 1/2 in. barrel, P320 mag. compatible, Mil-Spec parts, SB Tactical A3 or PDW brace, milled billet aluminum rear or side-charging upper and lower receiver, Picatinny rail, M-LOK handguard, DOJ cable lock a...

Rider (CLT) Image

Rider (CLT)

.45 ACP cal., 16 in. barrel, Colt SMG mag., Mil-Spec lower parts, Mil-Spec or Hiperfire Hipertouch Competition trigger, Magpul MOE collapsible stock, QC10 milled billet aluminum rear or non-reciprocating side-charging upper and lower receiv...

Ranger (GSF) Image

Ranger (GSF)

9mm Para. or .40 S&W cal., 5 1/2, 7 1/2, or 10 1/2 in. contour barrel, Glock compatible mag., enhanced Mil-Spec trigger, SB Tactical A3 (side-charging) or PDW brace, Magpul MOE (rear-charging) or Reptilia (side-charging) grip, ambi safety s...

Rider (CLT) Image

Rider (CLT)

9mm Para. cal., 5 1/2, 7 1/2, or 10 1/2 in. barrel, Colt SMG mag., Mil-Spec parts, SB Tactical A3 or PDW brace, milled billet aluminum rear or side-charging upper and lower receiver, Picatinny rail, M-LOK handguard, DOJ cable lock and carry...

QC5 YKMF-5 Image

QC5 YKMF-5

9mm Para. cal., blowback operation, 5 1/2 in. barrel, Dead Air Silencer Micro Brake, MP5 mag., SB Tactical PDW brace, Phase 5 ambi selector switch, 4 1/4 in. Bowden Tactical handguard, milled billet side-charging upper and lower receiver, P...

QC10 MINI MAYHEM Image

QC10 MINI MAYHEM

9mm Para. cal., 5 1/2 in. barrel, 33 shot double stack Glock mag., enhanced Mil-Spec trigger, SB Tactical SBA3 brace, Magpul MOE grip, Radian Talon ambi safety selector, non-reciprocating adj. buffer system, Law Tactical bolt assembly, LRBH...