Lower Receiver Assemblies

Lower Receiver Assemblies

Lower Receiver Assemblies Product Image

All of Blackheart International's three lower receiver platforms—the BHI SPR, BHI SSA and BHI MIL-SPEC—were developed around the purpose-built BHI-15 lower receiver. This precision-engineered semi-auto lower receiver is CNC-machined from solid aluminum billet for maximum strength (compared to casting), and to eliminate dimensional inconsistencies (compared to forging). Additional features include an oversized magazine well lip for easy magazine insertion, receiver extension tube reinforcement, and a hardened black anodized finish for durability. The multi-caliber design allows this receiver to be used to custom-build your rifle in a variety of calibers.

Blackheart International's lower receiver assemblies provide a solid foundation for any AR-style custom rifle package, allowing the builder to gear up with their choice of upper receiver assembly and barrel configurations, or select from one of Blackheart International's four pre-configured 5.56 NATO upper receiver/barrel assemblies. All BHI-15 upper receiver assemblies feature 16- or 20-inch precision medium-contour Criterion barrels, the exclusive BHI-15 Rifle-Length Hand Guard system, and the choice of a forged aluminum A3 flat top or billet aluminum Slick-Side receiver. Also available is the BHI-15 MIL-SPEC upper receiver, with its 16-inch medium-contour Criterion barrel and A3 flat top receiver.


This model is fitted with a premium Stark pistol grip, Wolff Springs for reliability and improved spring energy over stock or replacement-type service springs, plus Geiselle's DMR (Designated Marksman Rifle) trigger group. The DMR trigger is a two-stage adjustable unit, making this an ideal trigger for everything from precision tactical/target shooting to hunting. Backing the assembly is the Magpul PRS (Precision Rifle/Sniper) stock, which features fine-tune cheek riser height and length-of-pull adjustments combined with a machined aluminum butt-plate and alloy steel adjustment shaft for maximum strength and shooter comfort.


It delivers the same BHI-15 lower receiver, Wolff Springs and Stark pistol grip, but incorporates the field-proven Vltor Clubfoot six-position collapsible stock and Geissele SSA (Super Semi-Auto) two-stage trigger. Among the benefits of the Vltor Clubfoot stock are the modular Cheek Weld Adapters for a custom fit, easy adjust lock system, quick-detach sling swivel adaptability and the "Clubfoot" design itself, which allows the shooter to support the base of the stock with the non-firing hand.


The BHI MIL-SPEC includes the same BHI-15 billet lower receiver and Wolff Springs upgrade as the aforementioned lower receiver assemblies, but is outfitted with a MIL-SPEC trigger group, A2 pistol grip and standard 6-position collapsible stock.


Expand for more details on this Product

Intelligent Rail Technology (Concept)

Product From BERETTA

During the 2013 AUSA Annual Meeting and Exposition, Beretta Defense Technologies (BDT), on behalf of Beretta USA, along with T.Worx Ventures (TWV – a subsidiary of Prototype Productions, Inc.) officially displayed a breadboard concept of the Beretta ARX160 integrated with Intelligent Rail technology.

Get Info Now

M7000 Series Suppressor Cover

Product From Manta Rails

Manta is now manufacturing their new M7000 series suppressor cover and will fit 1.5 inch diameter suppressors.

The use of revolutionary materials, coupled with cutting-edge designs has allowed Manta to solve a problem that plagues every suppressor, HEAT! The Manta Suppressor Cover will resist the extreme heat generated from suppressors; thus, protecting operators and gear from accidental burns while helping to reduce mirage and IR signature. Cover segments can interface together and can be cut to length for a custom fit.

Get Info Now

XRail Systems

Product From Midwest Gun Works

 Midwest Gun Works Inc. is proud to carry the full line of XRail Systems by Roth Concept Innovations (RCI). The XRail System and other RCI high capacity magazine solutions and accessories for shotguns are all high-quality, made in the USA products for Benelli, Remington, FNH, Mossberg and Winchester shotguns.

Get Info Now

TGL Kit for Diamondback Pistols

Product From LASERLYTE

LaserLyte introduced the latest in the TGL series for the Diamondback pistols featuring the LaserLyte Master Module system. The versatile Master Module fits into the gun’s housing seamlessly; matching the gun’s dust cover and trigger guard with perfect fit. The LaserLyte TGL UTA-DB Kit fits the Diamondback .380 and 9mm models.

Get Info Now

Tekko Metal AR Carbine Integrated Rail System


Mission First Tactical, LLC (MFT) introduced the Tekko Metal AR Carbine Integrated Rail System (T-MARC)that replaces any plastic factory handguard with an American made, 7-inch, lightweight 6061 aluminum, hard coat anodized rail. The T-MARC requires no tools or gunsmithing for installation.

Get Info Now

Black Line - AR Accessories

Product From B-SQUARE, a part of The Safariland Group

The B-Square brand launched of the new BSquare Black line of firearms accessories in response to an overwhelming consumer demand for high-quality, professional black-gun products to customize AR-style firearms.

Get Info Now

Custom Grip Panels for 1911

Product From Pachmayr, a division of Lyman Products Corp.

Pachmayr introduced new color choices for their American Legend Grips for the standard 1911. With proven recoil absorbing rubber panels, comfortable finger grooves and attractive wood trim, Pachmayr’s American Legend Grips now offer a range of eye-catching colors. Choose Rosewood, Tropical Purple, Tropical Passionwood, Evergreen Camo, Charcoal Silvertone or Heritage Walnut laminate. All grips feature the popular American Legend wrap-around design with relief cuts for ambidextrous safeties and mainspring housing pin cut-out. Whether for blued, stainless or any finish, these new American Legend Grips will enhance both the looks and handling of 1911’s.

Get Info Now

MPA556S-II and Murmur II Suppressors

Product From MasterPiece Arms, Inc.

The MPA556S-II is a user serviceable can, utilizing a monocore design that gives the end user the ability to service and clean the suppressor without having to send it back to the manufacturer. This MPA556S-II can handle 5.56x45mm, .223, 5.7x28mm, 22LR, 22 WMR and 17HMR with exceptional performance. The DB ratings in 5.56 is in the 133 DB range (10 shot weighted average using NI Labview Software / GRAS ¼” MICs) and in 22LR, the can meters in the 113 DB range. The ability to service the suppressor by the end user allows the can to handle 22LR without shortening the life of the product due to the dirty nature of this ammunition. The weight of the can is in the 15 ounce range, utilizing a titanium outer tube and front cap and a 17-4PH core. The MPA556S-II can handle full auto fire on full length barrels in 5.56, so it is built to last. 

Get Info Now

MOD1 Carbine Length Hand Guard

Product From American Built Arms Co.

American Built Arms Company is proud to introduce the A*B Arms MOD1 hand guard.

1) This hand guard is a 2 piece design with upper and lower heat shields for maximum cooling.

2) Designed and engineered to accommodate gas piston or direct gas impingement systems.

Get Info Now

A*B Pro Carbine Length Hand Guard

Product From American Built Arms Co.


American Built Arms is proud to introduce the A*B Arms A*B Pro hand guard in Black.

1) This hand guard is a two piece design with upper and lower heat shields for maximum cooling.

2) Designed and engineered to accommodate gas piston or direct gas impingement systems.

Get Info Now