Aerko International
Authorized Dealer • Law Enforcement CS/OC Sprays Since 1973
Aerko International has supplied law enforcement agencies with aerosol defensive sprays since 1973 and pioneered the Freeze +P CS/OC blend — the tear-gas + pepper-spray combination that made Aerko the go-to duty-spray manufacturer for departments that wanted something more incapacitating than straight OC. Keep Shooting carries the full civilian-available Aerko lineup: Freeze +P in 2oz and 4oz personal-carry sizes, Deep Freeze foggers for vehicle and home defense, and Clear Out tear-gas grenades for extraction and crowd-control training scenarios.
About Aerko International at Keep Shooting
Keep Shooting is an authorized Aerko International dealer carrying the company's civilian-available lineup of CS/OC defensive sprays and tear-gas grenades. Aerko has supplied law enforcement agencies with aerosol weapons since 1973, and the Freeze +P formulation — the blended CS tear gas and OC pepper-spray duty cartridge that Aerko pioneered — remains one of the most widely used incapacitating agents in American policing. Our catalog covers the three flagship Aerko product lines in the sizes practical for civilian carry: Freeze +P pepper spray, Deep Freeze foggers, and Clear Out tear-gas grenades.
Aerko International is a division of Shamrock Filling LLC, a US aerosol manufacturer that specializes in CS, OC, and CS/OC combination sprays for law enforcement and public-safety end users. Shamrock Filling holds the ATF and DEA compliance certifications required to manufacture and distribute tear-gas aerosol products in the United States — a non-trivial regulatory bar that screens out the overseas commodity manufacturers who dominate the cheap-keychain pepper-spray shelf at big-box retail. Every Aerko canister is filled at the Shamrock production facility, which is one of the reasons individual-canister pricing is higher than grocery-store pepper spray: Aerko is a duty-grade manufacturer whose primary customer base is municipal, state, and federal law enforcement.
The company's Freeze +P formulation is the product that built Aerko's reputation. Four decades ago the R&D team set out to answer a specific question: can you combine the immediate pain-compliance effect of OC (oleoresin capsicum, the active compound in chili peppers) with the respiratory and mucous- membrane irritation effect of a tear gas, and produce a blend that works against subjects who are resistant to straight OC? A meaningful percentage of subjects — people on certain drugs, people in drug-induced rage states, people with diminished pain perception — will continue to fight through an OC-only spray. Tear gas works through a different physiological pathway (the trigeminal nerve and respiratory tract rather than the pain-receptor system), so combining the two produces a compounding effect that's harder for any single subject physiology to shrug off.
Aerko tested two candidate tear gases during the Freeze +P development program: CN (chloroacetophenone, the original 1920s tear gas used by military and police agencies through the mid-20th century) and CS (2-chlorobenzalmalononitrile, a newer agent developed at Britain's Porton Down facility in 1928 but not operationally adopted until the 1950s). US and British military testing had already established that CS reached an incapacitating dose at a substantially lower concentration than CN — meaning a CS-based aerosol could deliver more incapacitation per canister than a CN equivalent, with a lower toxicity profile at operational concentrations. CS became the standard military and law- enforcement tear gas worldwide by the 1960s, and Aerko adopted CS as the tear-gas component of the Freeze +P blend. CN is still available in some commodity products but has largely been phased out of serious duty-grade aerosol manufacturing.
A second engineering decision that distinguishes Aerko from the broader pepper-spray market was the choice to deliver Freeze +P in a coherent stream rather than a misty cone-spray pattern. Cone-spray dispersal sounds like an advantage in theory — a wider pattern means a higher hit probability — but in real-world use it creates two practical problems. First, a misty aerosol is highly susceptible to wind, and any significant crosswind or headwind will blow the spray off-target or back at the operator. Second, a cone pattern disperses the active ingredients across a large volume of air, reducing the effective concentration delivered to the subject's face and extending the reaction time before the compound reaches incapacitating levels. A coherent stream — essentially a high-pressure jet of fluid rather than a mist — cuts through moving air, delivers a higher concentration of active ingredient to the subject's eyes and respiratory tract, and extends effective range to 10-15 feet or more. The tradeoff is that the operator has to aim; the upside is that when the stream connects, the effect is immediate and overwhelming.
The Deep Freeze line is Aerko's fogger format — higher-volume canisters (9oz and 17.5oz sizes depending on configuration) that dispense in a diffusing fog pattern rather than a coherent stream. Foggers are the right tool for room-clearing, vehicle-entry, and any situation where the goal is to saturate an enclosed space with incapacitating agent rather than to hit a single individual subject. The 9oz Deep Freeze Tear Gas Fogger and 9oz Deep Freeze +P (pepper- spray + tear-gas combo) in our catalog are the civilian-available sizes of a product primarily designed for tactical teams, corrections officers, and home-defense applications in larger interior spaces.
The Clear Out line is Aerko's tear-gas grenade format — handheld dispersal canisters ranging from 2oz personal-training size through 6oz full-deployment size, plus a specialized "Extraction" variant designed for vehicle extractions and barricaded-subject situations. Clear Out grenades are the product most tactical training programs use for their CS-exposure blocks; every military and police academy in the country runs recruits through a CS chamber at some point, and the Clear Out 2oz grenade is a common training-load round. The 6oz grenade is the full-size operational variant that dispenses CS over a much larger volume of interior air. All three Clear Out grenades are handheld — you deploy them by removing the safety and releasing the top — rather than pyrotechnic launched grenades, which removes the fire-risk and 40mm-launcher dependencies that complicate pyro CS deployment.
Who actually needs Aerko-grade defensive spray? Three customer profiles dominate our Aerko sales. First, off-duty and retired law enforcement buying civilian Aerko canisters as continuation of the duty spray they trained with — Freeze +P is the spray these buyers already know how to deploy under stress, and switching to a consumer-grade OC keychain product for off-duty carry isn't a compromise they're willing to make. Second, range instructors and training professionals who use Aerko Clear Out grenades and Inert Training Spray for force-on- force and less-lethal familiarization courses. Third, civilian home-defense and vehicle-carry buyers who have educated themselves past the drug-store pepper-spray tier and want a duty-grade product for personal protection — particularly in states where concealed-carry licenses are restricted or where a less-lethal option is preferable to a firearm for the specific threat profile. For the broader civilian pepper-spray category see our Pepper Spray category, which includes Aerko alongside Sabre Red and other law- enforcement-grade brands.
Aerko products are not legal for civilian sale in every US state. Several states restrict or prohibit tear-gas (CS) aerosols for non-law-enforcement civilians, with the specific rules varying by jurisdiction — some states prohibit CS entirely, some cap the canister size, some require a permit, and some restrict distribution to licensed dealers. Keep Shooting ships Aerko products in accordance with federal law and the regulations of the destination state; if you're in a restricted state our order system will flag the issue at checkout. If you have a question about whether a specific Aerko product is legal in your state, contact our customer-service team before ordering.
Keep Shooting ships all Aerko International products from our Pennsylvania warehouse with free shipping on orders over $49.95 and hassle-free returns (subject to hazardous-materials shipping regulations — some Aerko products ship via ground only and cannot be air-shipped or delivered to APO/FPO addresses). Whether you're an off-duty officer continuing your duty-spray carry, a range instructor stocking training grenades, a home- defense buyer stepping up from commodity pepper spray, or a corrections or security professional buying personal backup canisters, every Aerko product in our catalog is authentic Shamrock Filling factory inventory from a genuinely law-enforcement-grade American manufacturer.
Frequently Asked Questions — Aerko International
Yes, we maintain inventory of the most popular Aerko International products. Each product listing shows real-time stock status. If an item is temporarily out of stock, you can sign up for back-in-stock notifications on the product page.
Yes! All orders over $49.95 qualify for free shipping, including Aerko International products. Orders typically ship within 1–2 business days.
Keep Shooting offers hassle-free returns on Aerko International products. If you're not completely satisfied, contact our customer service team for a return authorization. All products must be in original, unused condition.
Yes, Keep Shooting is an authorized Aerko International dealer. All products are sourced directly and include full manufacturer warranty coverage.