Spearhead Pedersoli Model 86 / 71 Boarbuster Guidemaster 45-70 Muzzle Brake


Canadian dollars (CAD)

Designed for your Pedersoli Model 86 / 71 Boarbuster ( Mark II, HV-1 Camo, Evolution, Shadow ) and Guidemaster lever action rifles in 45-70. Greatly reduces recoil while keeping a sleek low profile. 


Proprietary true 2 baffle design. 90 degree radial ports intersect to create expansion chambers and forms true baffles for maximum recoil reduction with no concussion. Really stops the “Thump”. Not your average 45-70 radial muzzle brake.


.840″ in diameter. Muzzle brake is back tapered for a flush fit. Only adds 1.125″ forward of your barrel muzzle. (Back tapered to .709″).


Installs easily without strap wrenches, a tensioning key is included to ensure solid lockup.


Precision machined for exceptional fit and finish.


Your satisfaction is our utmost priority, therefore we offer an unconditional 30 day money back guarantee. For any reason you are not satisfied, please contact us and we will arrange a full refund, no questions asked.


Give yourself the edge in hunting you deserve, get your Spearhead Pedersoli Model 86 / 71 Boarbuster Guidemaster 45-70 muzzle brake today.



Diameter: .840″

Length: 1.750″

Weight: 50g / 1.764oz

Material: 17-4 PH stainless steel for exceptional corrosion resistance and strength.


Muzzle Brake installation instructions can be found HERE.

Weight .145 kg
Dimensions 25 × 18 × 8 cm
Thread Pitch

Pedersoli Model 86/71 5/8-24


Spearhead Machine


Spearhead Machine


Stainless (Guidemaster), Black Nitride (Boarbuster)


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