The ArmaLite M-15 Competition CO Compliant Rifle (model M153GN13CO, UPC 651984020371) is a semi-automatic, optics-ready AR-platform rifle configured for competition use and Colorado magazine-capacity compliance. Chambered in .223 Wylde for compatibility with both .223 Remington and 5.56x45mm NATO, it pairs a 16" match-grade stainless steel barrel (13.5" pinned and welded to a tunable brake) with a free-floating 12" competition handguard, Timney single-stage trigger, and adjustable Luth-AR MBA-1 stock in a lightweight, black hard-coat anodized package. mmguns.com+3Buds Gun Shop+3theshootingstore.com+3
Action, Caliber, and CO-Compliant Configuration
The M153GN13CO is a semi-automatic, direct-impingement M-15 (AR-15 pattern) rifle:
The .223 Wylde chamber is designed to offer the pressure tolerance of a 5.56 NATO chamber while maintaining tighter throat geometry for potential accuracy benefits with .223 Rem match loads.
Barrel, Gas System, and Muzzle Device
This model is built around a match-grade stainless steel barrel combined with tunable gas and muzzle systems:
Barrel length: 13.5" match-grade stainless barrel pinned and welded to the muzzle brake to create a legal 16" overall barrel length on the CO-compliant configuration greentop.com+1
Material: Stainless steel, match-grade profile Buds Gun Shop+2Palmetto State Armory+2
Twist rate: 1:8" RH, supporting a wide range of bullet weights typically used in .223/5.56 competition loads Buds Gun Shop+1
Gas system: Carbine-length gas system with an adjustable gas block, allowing tuning for specific ammunition and recoil characteristics Armalite Rifles -+2greentop.com+2
Muzzle device: ArmaLite tunable competition muzzle brake, pinned and welded; designed to reduce muzzle rise and allow user tuning in conjunction with the adjustable gas system mmguns.com+3Armalite Rifles -+3Buds Gun Shop+3
The free-floating barrel and tunable gas/brake combination are intended to support more consistent shot-to-shot performance and controllability in competition settings.
Handguard and Front-End Layout
The rifle uses a low-profile, 12" free-floating competition handguard:
Handguard length: 12"
Type: Free-floating competition handguard with M-LOK attachment points and a low-profile design Armalite Rifles -+2greentop.com+2
Front interface: Railed front sight base / short top rail section at the front for mounting a front sight or accessory rail segment, depending on specific vendor configuration Classic Firearms+2greentop.com+2
Free-floating the handguard from the barrel prevents handguard pressure from affecting barrel harmonics, which can be beneficial for accuracy in match use.
Receivers, Finish, and Construction
The M153GN13CO uses forged aluminum receivers with a durable protective finish:
The rifle is optics-ready, with no fixed iron sights installed from the factory, allowing the user to choose their preferred optic or sighting system. Buds Gun Shop+2shootingandgunstuff.com+2
Stock, Furniture, and Ergonomics
At the rear, ArmaLite equips the rifle with an adjustable Luth-AR MBA-1 stock:
Stock: Luth-AR MBA-1 Lightweight Precision Stock, adjustable for length-of-pull and comb (cheek) height mmguns.com+3Armalite Rifles -+3Buds Gun Shop+3
Stock construction: Polymer body over an AR buffer tube, designed to balance rigidity with weight reduction
Grip: Black polymer AR-style pistol grip (standard configuration; often a competition-profile grip in this line) mmguns.com+1
Adjustability in the buttstock allows users to fine-tune fit for body size, armor, and optic height, which is important in competition shooting where consistent cheek weld and eye alignment to the optic can affect performance.
Trigger, Safety, and Fire Controls
The M153GN13CO includes upgraded fire control components compared to a baseline Mil-Spec rifle:
Trigger: Timney single-stage, drop-in trigger, designed to provide a lighter, crisper break than standard GI-style triggers, aiding precision and shot-to-shot consistency shootingandgunstuff.com+3Buds Gun Shop+3Palmetto State Armory+3
Safety: Ambidextrous safety selector, enabling operation from either side of the receiver Buds Gun Shop+2Palmetto State Armory+2
Charging handle: Radian (formerly Rainier) Raptor ambidextrous charging handle on competition configurations, providing bilateral manipulation and extended latches suitable for rapid operation or use with optics. greentop.com+1
These components are tailored toward competitive and high-volume shooters who benefit from a consistent trigger break and ambidextrous controls.
Capacity, Dimensions, and Weight
Key physical specifications for the CO-compliant M-15 Competition:
These figures position the M153GN13CO as a compact, lightweight competition rifle while maintaining the barrel and stock configuration needed to meet CO-compliant requirements.
Typical Use and Application
The ArmaLite M-15 Competition CO Compliant M153GN13CO is oriented toward:
3-Gun and practical rifle competition, where tunable gas and muzzle systems, match-grade barrels, and upgraded triggers are common requirements. Armalite Rifles -+2greentop.com+2
Training and recreational shooting for users seeking a competition-style AR-pattern rifle in a Colorado-compliant configuration.
The rifle is shipped without optics, allowing shooters to configure it with their preferred red dot, LPVO, or scope and tailor accessories to the specific match or discipline.
Technical Specification Summary
ArmaLite M-15 Competition CO Compliant Rifle – M153GN13CO
Manufacturer: ArmaLite
Model: M-15 Competition CO Compliant
Part Number: M153GN13CO
UPC: 651984020371 theshootingstore.com+2greentop.com+2
Action: Semi-automatic, direct-impingement
Caliber: .223 Wylde (.223 Rem / 5.56x45mm NATO compatible)
Barrel:
Gas system: Carbine-length, adjustable gas block
Muzzle device: ArmaLite tunable competition muzzle brake (pinned & welded)
Handguard: 12" free-floating competition handguard, low profile with M-LOK attachment and railed front interface Armalite Rifles -+2greentop.com+2
Receivers: 7075-T6 forged aluminum; black hard-coat anodized finish Buds Gun Shop+2Palmetto State Armory+2
Trigger: Timney single-stage drop-in trigger
Stock: Luth-AR MBA-1 adjustable precision stock (length-of-pull and comb height)
Safety: Ambidextrous safety selector
Charging handle: Ambidextrous Radian Raptor (on competition configs) greentop.com+1
Magazine capacity: 10+1; ships with one 10-round magazine
Sights/optics: Optics-ready; no factory iron sights installed Buds Gun Shop+2Palmetto State Armory+2
Overall length: ~34.5"–35.5" (stock-dependent)
Weight: ~6.9 lb (unloaded)
By combining a .223 Wylde match-grade stainless barrel, adjustable gas system, tunable competition brake, free-floating 12" handguard, Luth-AR MBA-1 stock, Timney single-stage trigger, and CO-compliant 10-round configuration, the ArmaLite M-15 Competition CO Compliant M153GN13CO provides a technically focused, competition-oriented AR-platform rifle suitable for shooters requiring both enhanced performance features and compliance with Colorado capacity and barrel-length regulations.
The End
