Description

House Duty Rifle 

Built with purpose. Refined where it matters. 

At House Rifle Company, we believe in doing simple things right. The HDR (House Duty Rifle) is our first step into the commercial firearms market and reflects a deliberate approach to the AR-15 platform. After extensive testing, we developed a rifle that strips away anything unnecessary in favor of pure function. 

Every HDR is hand built to tolerances tighter than TDP spec using proven, tested components we believe are a true net positive to the AR-15 system. The result is a rifle built with exacting standards, refined fit and finish, and a clear focus on long-term reliability. 

The HDR is designed for shooters who value performance over flash. Every detail, from assembly methods to component selection, is intentional. Additional tuning options are available for customers running specific setups, especially high-backpressure suppressors. This allows us to reduce wear on the system and tailor the rifle to run the way you want it to. The vision behind the HDR is simple: build a rifle you never need to replace. 

Built with Purpose
The HDR is a rifle built around discipline, not distraction. It reflects a straightforward philosophy: use proven parts, apply sound assembly practices, and hold tight standards throughout the build. Nothing is there for appearance alone. Every feature exists to improve reliability, consistency, and service life. 

Refined Where It Matters
From the upper receiver to the buffer system, the HDR is built to deliver dependable performance under hard use. Tighter-than-TDP tolerances, individually verified components, and available gas tuning for specialized setups all contribute to a rifle that performs with consistency and longevity. It is not built to chase trends. It is built to last. 

Upper Receiver 

• Trued and lapped receiver face  

• Bedded barrel  

• Tuned gas system (if selected)  

• 4150 chrome-lined barrel  

• Double dimpled and pinned gas block 

• Radian Raptor charging handle  

Bolt Carrier Group 

• Honed, fitted, and sealed carrier key  

• T-OCKS used to secure carrier key  

• Golf ball dimpling for increased material retention around the carrier key  

• SprinCo extractor and ejector springs  

• SprinCo gas rings  

• Gas 3-bore gauged and checked for maximum efficiency  

• Every bolt is headspaced to its corresponding barrel  

Lower Receiver 

• Intermediate length buffer tube with VLTOR buffer  

• SprinCo rifle-length spring  

• Echo Zulu castle nut staked a minimum of three times  

Build Standards 

• All same-material threads are torqued with threadlocker  

• All dissimilar-material threads are triple seasoned and torqued with Aeroshell 64  

• All rifles are test fired to confirm proper ejection pattern  

• All uppers are tested in both semi-auto and full-auto fire  

• All critical specs are held notably within TDP  

Information Found on the Spec Sheet 

• True headspace  

• Bolt carrier measurements  

• Test-firing schedule  

• Information on all gauged parts  

• Gas system information 

Specifications 

• Barrel Contour: SOCOM  

• Barrel Length: 11.5″  

• Barrel Material: 4150 Chrome Moly Vanadium Steel  

• Twist Rate: 1:7  

• Caliber: 5.56 NATO  

• Gas System Type: Direct Impingement  

• Gas System Length: Carbine 

• Platform: AR-15