Adams Arms P2
Adams Arms · Carbine · In Production · 2019
Also known as: P2 AARS, P-Series P2
Overview
The Adams Arms P2 is a semi-automatic carbine chambered in 5.56x45mm NATO, produced by Adams Arms since 2019. Featuring a 30-round magazine capacity, this carbine offers generous firepower for duty use and home defense.
Specifications
| Weight (empty) | 3175 g (112.0 oz) |
| Weight (loaded) | 3745 g (132.1 oz) |
| Overall Length | 876 mm (34.49") |
| Folded Length | 774 mm (30.47") |
| Barrel Length | 406 mm (15.98") |
| Action Type | Gas Operated Short Stroke Piston |
| Firing Mechanism | Hammer Fired |
| Trigger Type | Single Stage |
| Trigger Pull | 32 N (7.2 lbf) |
| Magazine Capacity | 30 rounds |
| Magazine Type | Detachable Box |
| Muzzle Velocity | 914 m/s (2999 fps) |
| Muzzle Energy | 1672 J (1233 ft·lbf) |
| Effective Range | 500 m (547 yd) |
| Maximum Range | 3600 m (3937 yd) |
| Rate of Fire | 800 rpm |
| Barrel Rifling | Right Hand |
| Rifling Twist | 178 mm (7.01") |
| Number of Grooves | 6 |
| Frame Material | Aluminum Alloy |
| Barrel Material | Steel |
| Stock Material | Polymer |
| Finish | Hard Anodized |
Calibers
- 5.56x45mm NATO · primary · 5.56x45mm NATO — also known as 5.56mm NATO, 5.56x45mm, .223 Remington
Features
- Firing modes: Semi Automatic
- Feed systems: Detachable Box Magazine
- Safety mechanisms: Manual Safety Selector, Half Cock Notch
- Features: Collapsible Stock, Accessory Rail, Chrome Lined Barrel, Rotating Bolt, Flat Top Receiver, Picatinny Rail, M Lok Handguard, Free Floating Rail, Adjustable Gas Block, Ambidextrous Controls, Flip Up Sights
Service history
Operators
- Law Enforcement · as P2
- Civilian Sport Shooters · as P2
Production
Production years: 2019-2024, 2025-present
Production temporarily halted in 2024, resumed under new ownership by Alexandria Pro-Fab
Origin
Country of origin: United States
Designer: Jim Granger
Notes
Adams Arms pioneered piston retrofit kits for AR-15 rifles before developing complete piston-driven firearms. The company was founded by Jim Granger in Palm Harbor, Florida, and became well-known for their patented short-stroke piston system. The P2 model features their latest generation micro-adjustable gas block which provides more precise tuning than previous designs. The short-stroke piston system differs from long-stroke designs (like PWS or AK-47) by using an operating rod that does not travel the full length with the bolt carrier. This results in less reciprocating mass and theoretically better accuracy. The rifle is designed to accept standard AR-15 magazines and most aftermarket accessories. Adams Arms temporarily ceased operations in 2024 but was acquired by Alexandria Pro-Fab, with plans to resume production. The P2 is available in multiple barrel lengths and calibers including .308 Winchester variants.
Background
Adams Arms built their reputation by offering piston conversion kits that could transform standard AR-15s into piston-driven rifles, allowing shooters to upgrade existing firearms. The P-Series represents the culmination of their piston system development, incorporating lessons learned from years of retrofit kit production into purpose-built complete rifles.