Yankee Hill Machine Sidewinder M2 45Acp Suppressor .578-28
$569.06
$659.95
(You save
$90.89
)
- Caliber-Gauge:
- 45 ACP
The Yankee Hill Machine Sidewinder M2 .45 ACP suppressor is a lightweight, user-serviceable can built for shooters who want effective sound reduction without the weight or the premium price tag. This .578x28-threaded suppressor pairs proven materials—7075-T6 and 6061-T6 aircraft-grade aluminum, plus heat-treated 17-4PH stainless steel—with a redesigned booster system and Nielsen device that work seamlessly on semi-automatic .45 pistols. Whether you're running a Glock G21 or another .45 platform, the Sidewinder M2 delivers practical suppression and shooter control in a compact package.
What sets the Sidewinder M2 apart is its modularity and serviceability. The booster uses industry-standard piston dimensions—meaning you can use aftermarket pistons from SilencerCo, Dead Air, Rugged, and others—and swap them out by hand thanks to the redesigned rear cap. No special tools needed for piston changes. The front cap geometry also improves engagement with the takedown tool, making field and bench maintenance straightforward. With 12 indexing points, you can dial in your point of impact while the suppressor stays mounted, a genuine convenience feature for serious shooters dialing in loads or making sight adjustments.
Construction reflects YHM's no-nonsense approach: the mono-core baffle delivers high efficiency in a slim 1.375-inch diameter, and Class 3 hardcoat anodize protects all aluminum surfaces against corrosion and wear. The Nielsen piston assembly and blast baffle, machined from 17-4PH, handle sustained fire and temperature extremes without degradation. At 10.55 ounces and 9.3 inches long, the Sidewinder M2 is built to stay in the fight without becoming a liability. Testing to Mil-Std 1474D on a stock Glock G21 with 230-grain FMJ ammunition shows 133 dB dry—solid suppression that opens up further when run wet.
User-serviceable design means you own the maintenance: the baffle and Nielsen device come out for cleaning via the included disassembly tool, so you're not locked into a manufacturer's service schedule. For .45 ACP shooters who demand reliability, modularity, and real value, the Sidewinder M2 is a smart choice.
Key Features
- Industry-standard piston design—compatible with SilencerCo, Dead Air, Rugged, and other aftermarket pistons
- Tool-free piston swap thanks to redesigned rear cap
- 12 index points for point-of-impact adjustment while attached to the host pistol
- User-serviceable mono-core baffle and Nielsen piston assembly—disassembly tool included
- Aircraft-grade aluminum construction with Class 3 hardcoat anodize finish
- 17-4PH stainless steel piston, Nielsen sleeve, and blast baffle for corrosion and heat resistance
- Lightweight and compact: 10.55 oz, 1.375" diameter, 9.3" overall length
- Optimized for reliable semi-automatic operation on all compatible .45 pistols
Specifications
| Caliber | .45 ACP |
| Thread Pattern | .578x28 RH |
| Overall Length | 9.3 inches |
| Diameter | 1.375 inches |
| Weight | 10.55 ounces |
| Material | 6061-T6 and 7075-T6 aircraft aluminum; 17-4PH heat-treated stainless steel |
| Finish | Type III Class 3 hardcoat anodize, matte black |
| Sound Level (Dry) | 133 dB (Mil-Std 1474D, Glock G21, 230gr FMJ) |
| Configuration | User-serviceable with 12 index points |
Frequently Asked Questions
Will this suppressor work with other aftermarket pistons?
Yes. The Sidewinder M2 uses industry-standard piston dimensions, so you can swap pistons from SilencerCo, Dead Air, Rugged, and other manufacturers—and vice versa. The redesigned rear cap lets you change pistons without tools.
Is the Sidewinder M2 user-serviceable?
Absolutely. The baffle and Nielsen piston assembly can be removed for cleaning and maintenance using the included disassembly tool. You don't need to send it back for service.
What pistols is this suppressor compatible with?
The Sidewinder M2 is optimized for semi-automatic .45 pistols. The Nielsen device ensures reliable operation on all relevant .45 hosts. Thread attachment is .578x28 RH.
Can I adjust the point of impact while the suppressor is mounted?
Yes. The Sidewinder M2 has 12 index points that let you rotate and adjust your point of impact without removing the suppressor from the host firearm.
Firearm Shipments:
To buy rifles or shotguns, you must be 18 years old, and for handguns, actions, or receivers, the minimum age is 21. By placing an order for this firearm, you confirm that you are the legitimate transferee/buyer, meet the legal age requirements, and comply with all Federal, State, and local laws and regulations necessary to purchase this firearm.
We only ship firearms to valid Federal Firearms License (FFL) holders. At checkout we provide a FFL locator for your convenience.
We will need a copy of the FFL’s license to facilitate the process, kindly request your dealer to email us a copy of their FFL, as we cannot dispatch the firearm until we receive this document. It is imperative for the buyer to choose their FFL dealer, ensure they are willing to facilitate the transfer, and have them email their FFL copy to BOSQUE Outdoors. To avoid any confusion, the customer's name or order number must be mentioned in the email containing the FFL.
Email: [email protected]
- Prior to placing an order, it is the buyer's responsibility to understand and adhere to their state's firearm regulations.
- The buyer should verify with their receiving dealer that the chosen firearm is legally permissible in their state.
- The buyer is accountable for any transfer fees or background check charges imposed by the receiving dealer. If the designated dealer declines to accept the firearm delivery, the buyer assumes responsibility for shipping costs to retrieve the firearm and resend it to an accommodating dealer.
- Handguns will be shipped using air transportation, while long guns can be shipped using ground methods. If your order includes a mix of firearm and non-firearm items, BOSQUE Outdoors will send the firearm(s) to your selected FFL dealer and the remaining non-firearm items to your billing address.
- Firearms cannot be returned to BOSQUE Outdoors; please contact the manufacturer for warranty claims.
- Firearms refused by the FFL Dealer or which cannot be transferred due to a failed background check are subject to a $75 restocking fee plus 10% of the purchase price.
