Radical Firearms M4 Profile 5.56 NATO Short Barreled Rifle 7.5 Inch Barrel
User Ratings
No ratings yet
Be the first to review this product
What's in the Box
- Radical Firearms M4 Profile 5.56 NATO Semi-Auto Short-Barreled Firearm
- (1) 30-Round Magazine
- Cable Lock
- Owner's Manual
The Radical Firearms 7.5" M4 Profile 5.56mm AR Pistol uses MIL-STD Upper and lower receivers along with their 7" RPR free float rail system for increased accuracy, keeping your hands cool, and giving you plenty of room for accessories. Regardless if it’s your first or fiftieth, a Radical Firearms AR pistol will not disappoint!
Firearm Features
- MIL-STD Safety
- 1/2x28 Thread
- Forged 7075 T6 Upper & Lower Receivers
- MIL-STD Forward Assist
- M-LOK Thin Freefloat Rail
Firearm Specifications
- Manufacturer: Radical Firearms
- Model: M4 Profile
- Caliber: 5.56 NATO
- Barrel Length: 7.5"
- Twist Rate: 1:7"
- Finish: Black
- Magazine Capacity: 30 Rounds
Specifications
- Manufacturer:
- Radical Firearms
- Category:
- lower-receiver
- Caliber:
- 5.56x45mm NATO
- Platforms:
- AR-15
- Interfaces:
- Muzzle thread: 1/2-28Magpul M-LOK
- MPN:
- FR7.5-5.56M4-RPR
- Required Component:
- Yes
- Complete Firearm:
- Yes
Parts Cabinet
Track parts you own or plan to buy.
Where to Buy
Sponsored
MantisX
The smart way to train your AR build
Built your rifle — now train it. BlackBeardX installs in minutes and turns your AR into a full dry fire system with smart feedback on every pull.
Shop BlackBeardXPrice History
Current
$479.99
Lowest
$449.99
Highest
$479.99
Price Alert
Sign in to save a target price and receive an email when this component drops.
Sign In to Set AlertWhat's Included in this Bundle
Similar Products

Griffin Armament MK2 Ambi Stripped AR-15 Lower Receiver - Ambidextrous Controls - Flared Magwell - Anodized Black - MK2AL
Griffin Armament
$189.99

Aero Precision Inc M4E1 223/5.56mm AR-15 Stripped Lower Receiver
Aero Precision
$108.50

Geissele Automatics Super Duty Stripped AR-15 Lower Receiver - Desert Dirt
Geissele Automatics
$200.00

AERO PRECISION AR-15 Gen 2 Stripped Lower Receiver - Matte Black
Aero Precision
$89.99

LMT MARS-L Ambidextrous AR-15 Stripped Lower Receiver
LMT
$342.00

PSA AR-15 "Stealth" Stripped Lower Receiver
Palmetto State Armory
$69.99

PSA AR-15 Lower Safe/Fire - 1728
Palmetto State Armory
$64.99

PSA AR-15 M4 Carbine Stripped Lower Receiver
Palmetto State Armory
$79.99
Builds Using This Part
No builds yet — be the first to use this part.
Related Guides
Guide
AR-10 Receiver Patterns: DPMS vs. Armalite Compatibility
The AR-10 has two incompatible receiver patterns — DPMS and Armalite — that look similar but do not share parts. This guide explains the differences and how to buy correctly.
6 min read
Guide
The AR-10 Platform: What It Is and How It Differs from the AR-15
A practical overview of the AR-10 — its origins, how it differs from the AR-15, available calibers, and when it makes more sense than a standard AR-15 build.
6 min read
Guide
AR-15 Components: A Complete Reference Guide
A comprehensive overview of every major component in an AR-15 build—including what's inside bolt carrier groups and parts kits—organized by assembly for new builders.
12 min read