Skip to content

Para Bellum Arms

Home
About Us

About Us

Quality Promise

Brands We Use

Contact Us

Support Us
Design
Defining the Build

NFA and Prison

AR Class

What the Spec

Component Compatibility
Platform Components

Lower Receiver

Upper Receiver

Handguard

Platform Manufacturer
Operating System Components

Muzzle Device

Barrel

Gas Block

Bolt Carrier Group

Buffer

Buffer Spring

Receiver Extension

Trigger

Hammer/Trigger Pins
Controls

Charging Handle

Safety Selector

Magazine Catch/Button

Bolt Catch

Pivot/Takedown Pins
Furniture & Ergonomics

Buttstock

Pistol Grip

Foregrips & Stops
Special Topics

Metals & Finishes

Handguard Length

Roll Pins

Caliber Conversion

Sister Cartridges
Store
Small Frame Upper Assemblies

Carbine Upper Assemblies

Rifle Upper Assemblies
Small Frame Lower Assemblies

Carbine Lower Assemblies

Rifle Lower Assemblies
Small Frame Build Kits

Carbine Build Kits

Rifle Build Kits
Small Frame Components

Bolt Carrier Groups
Build
Start Here
Build Considerations

What’s at Stake

Lock & Lube

Torque Adjustment
Tools & Materials

Lubrication

Thread Locker

Wrenches

Drivers, Bits, & Keys

Hammers & Punches

Vises & Blocks

Miscellaneous Tools
How to Build

Upper Receiver Assembly

Lower Receiver Assembly

Final Assembly
Tutorials

Staking the Castle Nut

Build a Gas System Illuminator
Blueprints

PB Arms Clones (COMING SOON)

Military Clones
Maintain
Troubleshoot (COMING SOON)
Tools & Materials

Solvents & Lubricants

Chamber & Bore Tools

Patches, Pads, & Wipes

Miscellaneous Tools
Disassembly
Clean & Inspect

Cleaning the Upper

Cleaning the Lower
Lubricate
Reassembly

Function Check

Repair & Replace (COMING SOON)
Learn (PBU)

Menu

Home
About Us
Design
Store
Build
Maintain
Learn (PBU)

Para Bellum Arms

No products were found matching your selection.

EXPLORE

SUPPORT

LEGAL

Legal Disclaimer

Terms & Conditions

Shipping & Returns Policy

Join the PB Community!

Get the good stuff first — new product drops, behind-the-scenes updates, and our monthly newsletter that’s actually worth reading. We’ll never spam you, sell your info, or make you regret hitting “Subscribe.” Unsubscribe anytime (we won’t take it personally).

Footer CTA

I agree to receive occasional emails

Copyright © 2026 Para Bellum, LLC

Search for:

Age Verification

This site contains firearm-related content and products. You must be at least 18 years old and legally permitted to view this content in your jurisdiction.

By entering this site, you confirm that you meet these requirements.