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New Frontier Armory
Overview
The New Frontier Armory C5 9mm AR-15 Lower is a stripped lower receiver designed specifically for the AR-9 platform, making it an excellent foundation for building a 9mm firearm. With a standard trigger pin size of .154, this lower is compatible with a wide range of aftermarket parts, allowing builders to customize their setup to their preferences. This lower is typically used in builds focused on 9mm caliber configurations, catering to those looking to create versatile and compact firearm options.
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Based on build data

Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C
Charging Handle
Radical Firearms 5.56 Barreled Ar-15 Upper - 16" - Primary Arms Exclusive
Upper Receiver
Wilson Combat Ar-15 Billet Upper Receiver
Upper Receiver
Magpul AFG-2 Angled Fore Grip - Black
Foregrip
Radian Raptor Charging Handle & Talon Safety Selector Combo - Od Green
Charging Handle
Geissele Automatics Llc Ar-15 Ssa X Lightning Bow Trigger
TriggerAggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| Battle Arms Development Rack Ambidextrous Ar-15 Charging Handle - Mod C | Charging Handle | 248 |
| Radical Firearms 5.56 Barreled Ar-15 Upper - 16" - Primary Arms Exclusive | Upper Receiver | 185 |
| Wilson Combat Ar-15 Billet Upper Receiver | Upper Receiver | 183 |
| Magpul AFG-2 Angled Fore Grip - Black | Foregrip | 168 |
| Radian Raptor Charging Handle & Talon Safety Selector Combo - Od Green | Charging Handle | 156 |
| Geissele Automatics Llc Ar-15 Ssa X Lightning Bow Trigger | Trigger | 150 |
| Platform | Percentage |
|---|---|
| AR-10 | 100% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 71.4% |
| .223 Wylde | 10.1% |
| 300 Blackout | 6.5% |
| .308 Win | 3.3% |
| 9mm | 2.1% |
| .450 Bushmaster | 1.2% |
| 6mm ARC | 1.2% |
| 7.62x39mm | 0.9% |
| 6.5 Grendel | 0.8% |
| .458 SOCOM | 0.6% |
| .350 Legend | 0.3% |
| 6.5 Creedmoor | 0.3% |
| .45 ACP | 0.2% |
| .223 Remington | 0.2% |
| .204 Ruger | 0.1% |
| .224 Valkyrie | 0.1% |
| .50 Beowulf | 0.1% |
| 5.7x28mm | 0.1% |
| 6.8 SPC II | 0.1% |
| 7.62x51 NATO | 0.1% |
| 8.6 Blackout | 0% |
| .22 ARC | 0% |
| .22 LR | 0% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 49.9% |
| Carbine | 23.9% |
| Rifle | 13.2% |
| Pistol | 11.4% |
| Blowback | 1.2% |
| Intermediate | 0.2% |
| Proprietary | 0.1% |
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