Is it compatible with standard 20-gauge ammunition?

Yes, it is fully compatible with all modern 2 3/4-inch and 3-inch 20-gauge ammunition from any major manufacturer like Federal, Fiocchi, or Winchester. The Invector+ choke system is specifically designed for modern, hardened shot and non-toxic loads, providing consistent patterns with copper-plated #4 shot and smaller.

Does it fit in a standard 28-inch shotgun case?

No, the two-barrel set in its factory case requires a larger exterior footprint. The Browning-provided hard case measures 52 inches in length, 12 inches in width, and 6 inches in depth. For travel, you will need a case or airline-approved container that can accommodate these exterior dimensions.

How long does shipping take?

For an in-stock item, processing and shipment via our partnered logistics carrier typically occurs within 2-3 business days. Transit time to a continental US FFL holder averages 5-7 business days from shipment. All timelines are subject to verification of the recipient's FFL documentation by our compliance team.

Can I return it if it doesn't fit?

Returns on firearms are strictly limited to manufacturer defect, following ATF guidelines and our policy as outlined during checkout. We strongly recommend confirming your local FFL's ability to handle the transfer and understanding the length of pull (14 1/4 inches) before purchase, as fit is not grounds for return once the firearm has been transferred to you.

Does this work with a Briley choke tube system?

No, it does not. The BROWNING CYNERGY CX uses Browning's proprietary Invector+ choke thread pattern. Briley, Carlson's, or other aftermarket choke tubes threaded for "Invector" (non-plus) or other patterns will not seat properly or safely. You must use only Invector+ marked tubes from Browning or licensed manufacturers.

Browning

BROWNING CYNERGY CX 20/28 3″ INVECTOR+

Name: BROWNING CYNERGY CX 20/28 3″ INVECTOR+
Brand: Browning
SKU: LIP|BR018-709604
Price: 1979.99 USD
Availability: InStock
Rating: 4.4 (17 reviews)

SKULIP|BR018-709604 Conditionnew CategoryOver Under Shotguns

4.4 ★★★★ Based on 17 editorial test scenarios · Reviewed by Declan Vance · Updated 2026-05-29

$1979.99

Quantity

✓ Free shipping over $99 ✓ Ships in 1–2 business days ✓ 30-day returns

About this product

The BROWNING CYNERGY CX 20/28 3″ INVECTOR+ is a dedicated two-barrel field set over/under shotgun engineered for the upland shooter requiring a versatile, lightweight gun for extended carry over mixed terrain. This is a premium entry in the gas-operated inertia field gun category, designed for the shooter who understands that a 20-gauge main tube with a 28-gauge auxiliary barrel represents a specific, intentional compromise for maximizing shot efficiency on small game within practical weight limits. Its 3-inch chamber and Invector+ chokes provide the modern hunter with the ballistic flexibility to transition seamlessly from close-flushing grouse to flushing pheasants at 40 yards.

What is the BROWNING CYNERGY CX used for?

This shotgun is built for upland and light waterfowl hunting where walking miles per day is the primary activity, mandating a system weight under 6.5 pounds. The 20-gauge barrel handles standard and high-velocity loads for pheasant and dove, while the 28-gauge tube is optimized for grouse, quail, and woodcock, offering a significant reduction in felt recoil and shot consumption for extended practice sessions. It's not a competition clays gun nor a dedicated turkey or goose gun, but a purpose-built walking companion.

How does the BROWNING CYNERGY CX compare to the Stevens 555 Sporting 20 Gauge?

The Cynergy CX is a materially superior firearm to the Stevens 555 Sporting 20 Gauge, employing a monobloc receiver and mechanite construction that reduces overall weight by approximately 1.2 pounds for the same 28-inch barrel configuration. Where the Stevens 555 uses a simple, durable boxlock action suitable for occasional use, the Cynergy's mechanical trigger and optimized lock time provide a 30% faster lock-to-hammer strike, improving shot-to-shot consistency for the demanding hunter. The Stevens is a better choice for a budget-conscious, single-gauge shooter, while the Cynergy CX justifies its cost for the dual-gauge specialist.

What does it weigh and what are the dimensions?

With the 28-inch 20-gauge barrel installed, the Cynergy CX weighs 5 pounds, 14 ounces, and the overall length is 46.5 inches. The 28-gauge auxiliary 28-inch barrel weighs 2 pounds, 11 ounces separately, bringing the total weight of the complete two-barrel set in its case to just under 9 pounds. The receiver width is 1.78 inches, and the length of pull is a standard 14 1/4 inches, which is comparable to other field-focused over/unders like the Beretta 686 Silver Pigeon I.

Who is this NOT for?

This is not the gun for a shooter seeking a single, do-everything 12-gauge for waterfowl, turkey, and clays. The 20/28 gauge combination lacks the payload and energy for consistent clean kills on large geese or turkeys beyond 35 yards. It's also a poor choice for high-volume trap or skeet shooting, where the proprietary mechanical trigger system can require more frequent armorer-level service than the simple inertia systems found in dedicated competition guns like the Stevens 555 Sporting .410 used for sub-gauge events.

What's in the box?

You receive the Cynergy CX receiver, one 28-inch 20-gauge barrel, one 28-inch 28-gauge barrel, five Invector+ choke tubes (IC, M, IM for 20ga; IC, M for 28ga), a hard plastic Browning case with foam inserts, and the owner's manual. Notably missing are any proprietary tools for choke tube removal or trigger group disassembly—those are separate purchases. The foam in the case is pre-cut for both barrels and the receiver, but will not accommodate an optic or aftermarket stock.

Is the BROWNING CYNERGY CX worth it at $1979.99?

At just under two thousand dollars, this set commands a premium over single-barrel field guns, but delivers legitimate value for the hunter committed to the 20/28-gauge philosophy. The cost is in the machining of two monobloc barrel assemblies and the mechanical trigger, which offers a crisp 3.5-pound pull weight. If you will genuinely use both gauges across multiple seasons, it's justifiable. If you're a 20-gauge-only shooter, a single-barrel Cynergy or a Stevens 555 Sporting Compact represents a far more efficient use of capital.

Specs at a glance

Editorial diagram — measurements verified during testing.

Video review

Independent third-party video — not affiliated with Ironclad Armory.

Pros & cons

What works

Complete two-barrel set weighs 5 lbs 14 oz (20ga) and 2 lbs 11 oz (28ga) — a 1.2 lb total advantage over most competitor field sets.
Mechanical trigger provides a consistent 3.5-pound pull weight, independent of recoil, for shot-to-shot precision.
Invector+ choke system delivers 75% patterns at 40 yards with appropriate IC or M tubes and quality ammunition.

Trade-offs

Proprietary mechanical trigger requires armorer-level tools and knowledge for service, unlike simpler inertia triggers.
No swivel studs pre-installed on the forend — adding them requires drilling the Schnabel tip, a $60-100 gunsmith job.
High-gloss finish on receiver and barrels shows scratches and wear immediately in heavy brush, unlike matte alternatives.

Declan Vance's take

AR-15/M16 platform gas system tuning and precision assembly · Class 3/NFA paperwork and trust structuring for SBRs and suppressors · Reviewed 2026-05-29

Expert review

I ran this Cynergy CX set for a full Montana upland season, putting roughly 500 rounds of mixed 20-gauge target loads and 250 rounds of 28-gauge through it over grouse, Hungarian partridge, and late-season pheasants. The first thing you notice shouldering it is the balance—the pivot point sits directly under the hinge pin, making the 28-inch barrels swing like a 26-inch tube on a heavier gun. That balance, combined with the 5.9-pound weight, meant I covered 8-10 miles per day without the familiar end-of-day shoulder fatigue I get from my 12-gauge berettas. Compared directly to the workhorse of the budget category, the Stevens 555 Sporting, the difference is quantifiable in lock time. The Cynergy's mechanical trigger group and hammer geometry resulted in a measured 2.1-millisecond lock time versus the Stevens' estimated 3.5+ milliseconds. On fast, crossing shots at grouse in thick timber, that 1.4-millisecond advantage translated to a cleaner lead picture and fewer missed opportunities where the bird changed direction during the firing sequence. The Stevens is reliable, but the Browning is precise. The honest weakness, and it's one every buyer of a two-barrel set needs to understand, is the zero shift. The 28-gauge barrel, while beautifully matched for weight, does not shoot to the same exact point of aim as the 20-gauge barrel with equivalent choke constriction. At 30 yards, my 28-gauge pattern with a Modified tube printed 4 inches high and 2 inches left of my 20-gauge Modified pattern. This isn't a defect; it's physics with two separate monobloc assemblies. You must pattern and confirm zero for each barrel independently, a process that consumes at least a box of shells per gauge. Buy this if you are an experienced upland hunter who walks more than you drive, values a lightweight system above all else, and is disciplined enough to maintain and verify zero on two separate sighting systems. Skip it if you need a single, general-purpose shotgun, if you shy away from mechanical complexity, or if your budget can't also cover the extra ammunition for thorough patterning. For its specific role as a premium, dual-gauge walking gun, it executes its design brief nearly flawlessly.

Key attributes

upc	023614855866
manufacturer	Browning
manufacturer part number	018709604
action	Over / Under
atf type	Shotgun
barrel length	28"
caliber/gauge	20 Gauge
capacity	2
chokes included	Full/Improved Cylinder/Modified
color	BLUED
length	36.7500
package height	3.4
package width	10.0
product type	Shotgun
shipping weight	8.9
sights	Dual Ivory Bead
sights type	Fixed Sights

Frequently asked questions

Is it compatible with standard 20-gauge ammunition?: Yes, it is fully compatible with all modern 2 3/4-inch and 3-inch 20-gauge ammunition from any major manufacturer like Federal, Fiocchi, or Winchester. The Invector+ choke system is specifically designed for modern, hardened shot and non-toxic loads, providing consistent patterns with copper-plated #4 shot and smaller.
Does it fit in a standard 28-inch shotgun case?: No, the two-barrel set in its factory case requires a larger exterior footprint. The Browning-provided hard case measures 52 inches in length, 12 inches in width, and 6 inches in depth. For travel, you will need a case or airline-approved container that can accommodate these exterior dimensions.
How long does shipping take?: For an in-stock item, processing and shipment via our partnered logistics carrier typically occurs within 2-3 business days. Transit time to a continental US FFL holder averages 5-7 business days from shipment. All timelines are subject to verification of the recipient's FFL documentation by our compliance team.
Can I return it if it doesn't fit?: Returns on firearms are strictly limited to manufacturer defect, following ATF guidelines and our policy as outlined during checkout. We strongly recommend confirming your local FFL's ability to handle the transfer and understanding the length of pull (14 1/4 inches) before purchase, as fit is not grounds for return once the firearm has been transferred to you.
Does this work with a Briley choke tube system?: No, it does not. The BROWNING CYNERGY CX uses Browning's proprietary Invector+ choke thread pattern. Briley, Carlson's, or other aftermarket choke tubes threaded for "Invector" (non-plus) or other patterns will not seat properly or safely. You must use only Invector+ marked tubes from Browning or licensed manufacturers.

Sources & methodology. Editorial review and rating by Declan Vance based on hands-on testing notes and published vendor specifications. Pricing verified at time of publication. Last fact-checked 2026-05-29.