Product Description
The Shorty Boy w/Fin Arm Brace 10.5-inch AR-15 5.56 NATO Pistol Full Build Kit from MCS is engineered for gunsmiths seeking precision and durability in a compact firearm. This kit features a 10.5-inch barrel made of 416R stainless steel with a 1:7 twist rate, optimized for .223 and 5.56 NATO cartridges. The polished stainless finish and M4 contour enhance both performance and aesthetics.
Included is a 10" M-Lok handguard that offers a lightweight design with integrated handstop and anti-rotation features. The kit also comprises a stripped upper receiver from 7075 T6 aluminum, alongside a complete bolt carrier group constructed from 9310 alloy steel. Accompanying the build is a polymer stabilizing brace from Gauntlet Arms, providing additional support. Weighing just 73.8 oz, the Shorty Boy is an ideal choice for shooters valuing both compactness and dependable performance.
Product Name: Shorty Boy w/Gauntlet Arms Brace 10.5-inch AR-15 5.56 NATO Pistol Full Build Kit
Caliber: 5.56x45mm NATO
Barrel Name: AR-15 10.5" "Needle" 5.56 NATO, SS, Carbine Gas, M4 Contour, 1-7 T Barrel
Barrel Material: 416R Stainless Steel
Barrel Length: 10.5-inch
Barrel Twist Rate: 1:7
Barrel Finish: Polished Stainless Steel
Barrel Thread Pitch: 1/2x28
Barrel Gas System: Carbine
Barrel Profile: M4
Muzzle Device: AR-15 1/2x28 TPI GI Birdcage Flash Hider 5.56 .223 A2
Muzzle Device Thread Pitch: 1/2x28
Muzzle Device Finish: Manganese Phosphate
Handguard Name: 10" MLOK AR-15 Handguard W/ Picatinny Rail, Integrated Handstop, Anti-Rotation Tabs, Trapezoid Cuts
Handguard Style: M-Lok
Handguard Color: Black
Gas Block Name: Recoil Technologies Micro Low-Profile Gas Block for .750 O.D Barrel Steel
Gas Block Size: 0.75
Gas Block Finish: Phosphate
Receiver Name: Stripped Upper Receiver with M4 Feed ramps - 7075 T6 Aluminum, Anodized
Upper Receiver Material: 7075 T6 Aluminum
Upper Receiver Finish: Anodized
Bolt Carrier Name: AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group
Bolt Carrier Material: 9310 Alloy Steel
Bolt Carrier Finish: Nitride
Charging Handle: AR-15 M4 Charging Handle Mil-Spec Quality
Charging Handle Finish: Anodized
Pistol Brace Information: Polymer Stabilizing Brace - Black from Gauntlet Arms
Brace Color: Black
