Colt AR-15 LE6920 5.56 Barrel – 16" Government Contour, Chrome Lined, 1:7 Twist – MPN 63505 (UPC: 098289600288)
Give your rifle true Colt performance with the AR-15 LE6920 5.56 Barrel 16" – MPN 63505, UPC 098289600288. This is the same style factory-produced Colt LE6920 replacement barrel used on Colt’s iconic Law Enforcement carbines, now available as a stand-alone part for rebuilds, duty guns, and clone-correct AR-15 builds.Primary Tactical+1
Built around a 5.56x45mm NATO chamber, a 16" government contour profile, and a chrome-lined bore, this Colt LE6920 barrel is designed for high round counts, rugged field use, and serious defensive or professional applications.MidwayUSA+1
Genuine Colt LE6920 OEM Replacement Barrel
This is not a generic AR barrel—it’s a Colt LE6920-pattern replacement designed to mirror the barrels installed on factory LE6920 rifles.Brownells UK+1
For armorers, agencies, and enthusiasts wanting correct Colt LE6920 specs—from chamber to contour—this barrel provides true OEM geometry and materials.
5.56 NATO Chamber & 16" Government Contour
The 5.56x45mm NATO chamber allows you to safely run both 5.56 NATO and .223 Remington ammunition, including hot duty loads and surplus ammo.MidwayUSA+1
The 16" government contour offers an ideal balance of:MidwayUSA
Durability under sustained fire
Manageable weight for patrol and defensive carbines
Compatibility with standard carbine handguards, rail systems, and front sight bases
This profile is the same style you’ll see on Colt’s LE-series rifles, giving your build authentic handling characteristics.
1:7 Twist & Six-Groove Rifling for Modern 5.56 Loads
Each AR-15 LE6920 5.56 barrel features six-groove rifling with a 1:7" twist rate, optimized for today’s heavier 5.56 bullets.Primary Tactical+1
Stabilizes common 55gr training ammo
Excels with 62–77 grain defensive and match projectiles
Ideal for duty, defensive, and SPR-style loads where heavier bullets shine
If you’re running modern bonded, OTM, or barrier-blind projectiles, this twist rate gives you the stability and accuracy those rounds are designed for.MidwayUSA+1
Chrome-Lined Bore & Parkerized Exterior – Built for Hard Use
Colt designed this LE6920 barrel for long service life in harsh environments:
Chrome-lined bore and chamber for corrosion resistance and easier cleaningMidwayUSA+1
Parkerized / phosphate exterior finish for classic military-style protection and low glareMidwayUSA+1
Quality chrome-moly steel construction for strength and heat resistance under rapid strings of fireMidwayUSA
Chrome lining dramatically extends barrel life, making this an excellent choice for high-volume range work, training guns, and patrol carbines that may see thousands of rounds.
Carbine-Length Gas System & 1/2"-28 Muzzle Threads
The LE6920 5.56 16" barrel is configured with the classic carbine-length gas system, offering proven reliability with standard carbine buffers and action springs.MidwayUSA+1
Key interface specs:
Gas system length: CarbineMidwayUSA+1
Gas block journal: 0.750" – works with most low-profile and fixed front sight gas blocksMidwayUSA
Muzzle threads: 1/2"-28 TPI for compatibility with standard 5.56 muzzle devices such as A2 flash hiders, brakes, and suppressor mountsBrownells+1
This makes the barrel a drop-in fit for most AR-15 carbine setups using standard 5.56 components.
M4 Feed Ramps & Reliable Cycling
Colt includes M4-style feed ramps on the LE6920 5.56 barrel, pairing with an M4-cut upper receiver to enhance feeding reliability—especially with varied bullet profiles and during rapid fire.MidwayUSA+1
Benefits of the M4 feed ramp configuration:
Smooth, consistent feeding with defensive and training ammunition
Reduced risk of nose-dives or feedway stoppages in high-tempo strings
Ideal for duty and defensive rifles where reliability is critical
Combined with the carbine gas system and Colt’s quality control, this barrel is engineered for dependable cycling under real-world conditions.
Perfect for LE6920 Rebuilds, Clones & Quality AR-15 Builds
The AR-15 LE6920 5.56 Barrel 16" 63505 is an excellent choice for:
Refurbishing a hard-used Colt LE6920 with a fresh, factory-pattern barrel
Building a Colt LE6920 clone or duty-style carbine with correct OEM specs
Upgrading a generic AR-15 with a proven, chrome-lined, 1:7 twist 5.56 NATO barrel
Agencies and armorers needing a reliable replacement barrel that matches existing fleet configuration
If your priority is real Colt spec, not just “mil-spec inspired” marketing, this barrel gives you the genuine article.Brownells UK+1
Key Specifications – AR-15 LE6920 5.56 Barrel 16" (63505 / 098289600288)
Why Choose the AR-15 LE6920 5.56 Barrel 16" 63505?
If you want a true Colt LE6920 16" 5.56 NATO barrel with:
Authentic government contour and 1:7 twist
Chrome-lined bore and chamber for longevity
Carbine-length gas system and M4 feed ramps for proven reliability
1/2"-28 threads for standard 5.56 muzzle devices
…then the AR-15 LE6920 5.56 Barrel 16IN 63505 (UPC 098289600288) is exactly the barrel you’re looking for—ideal for serious AR-15 builds, LE6920 rebuilds, and any shooter who demands Colt-grade quality from their rifle’s most critical component.
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