Windham weaponry's rp9 ar pistol in 450 bushmaster features a laser-engraved caliber mark on the left upper receiver.The 9" melonite qpq-finished barrel has a 1:24" twist with a.450 compensator and a 7" free-float handguard.The flattop receiver is forged from 7075 t6 aluminum with a black hardcoat anodized finish, features an aluminum magpul enhanced trigger guard, and has polymer front and rear flip sights.This semi-automatic uses a gas impingement system.It is fitted with an sb tactical pistol arm brace, hogue beavertail pistol grip, and a 5-round magazine.

Metal Finish: Black Hardcoat Anodized
Type: AR Pistol
Action: Semi-Auto
Caliber: 450 Bushmaster
Barrel Length: 9"
Capacity: 5+1
Safety: Lever
Grips: Black Hogue Rubber
Sights: Flip Up Front & Rear
Weight: 5.80 lbs
Stock Material: Synthetic
Oal: 26.25"
Stock Finish: Black
Stock Type: Pistol Stabilizing Brace
Barrel Length Range: 9" to 9.99"
Weight Range: 5 lbs to 5.99 lbs