Product Description
MCS AR-9 5" INCH PISTOL BUILD KIT 1:10 9MM FREEFLOAT M-LOK HANDGUARD FIN BRACE
The MCS IX w/FIN Brace 5-inch AR-9 Full Build Kit delivers a compact, reliable 9MM pistol platform for home defense, range use, and competitive shooting. Featuring a 5-inch 4150 CrMoV steel barrel with 1:10 twist rate and phosphate finish, 6061-T6 billet aluminum upper receiver with Type III hardcoat anodizing, 7-inch M-LOK freefloat handguard, 9MM Nitride BCG, and polymer MCS Fin Brace—perfect for AR-9 builds, PCC competition, close-quarters applications, and shooters seeking maximum maneuverability in a pistol-caliber AR platform.
Caliber: 9mm (9x19)
Barrel: MCS BC-9 5" PCC Barrel
Barrel Twist Rate: 1:10
Barrel Material: 4150 CrMoV
Barrel Length: 5-inch
Barrel Finish: Phosphate
Thread Pitch: 1/2x36
Barrel Profile: Slim Profile
Gas System Type: Direct Blowback
Upper Receiver: AR-15 Billet Upper Receiver for Pistol Calibers
Upper Receiver Material: 6061-T6 Billet Aluminum
Upper Receiver Finish: Type III Hardcoat Anodized
Handguard: 7" M-LOK Freefloat Handguard
Handguard Material: 6061-T6 Aluminum
Handguard Style: M-Lok
Handguard Color: Black
Handguard Finish: Hardcoat Anodized
Charging Handle: AR-15 M4 Charging Handle Mil-Spec Quality
Bolt Carrier Group: 9MM Nitride Bolt Carrier Group 8620 Alloy Steel
Bolt Carrier Material: 8620 Alloy Steel
Bolt Carrier Finish: Nitride
Brace: Polymer Stabilizing Brace - Black
Brace Material: High-Strength Polymer
Color: Black
Muzzle Device: 9mm Flash Can, 1/2X36
Muzzle Device Finish: Manganese Phosphate
Buffer Weight: 5.5 oz
