180 in 450 Bushmaster

[gvanzeggelaar]

What is the possibility of building a 180 variant in 450 bushmaster? I’m assuming all 450BM barrels have a 0.875” gas block and the 180s have a 0.750”. Any way around this?

 

[Brian46]

Someone like Herron Arms would be the person to talk to about caliber conversions. Likely cost as much as you paid for the 180 originally

 

[the radium king]

i've looked at it. you would have to drill out the gas block, but looks to be enough meat on it. or get a jard 180 with takes a gas system such that you can find an off the shelf gas block that would fit. you would also have to modify the bolt face. and find a barrel. 50 beowulf has a rebated rim that uses a 6.5 grendel bolt (tna sells them) but barrels harder to find and ammo ditto.

 

[Suther]

i've looked at it. you would have to drill out the gas block, but looks to be enough meat on it. or get a jard 180 with takes a gas system such that you can find an off the shelf gas block that would fit. you would also have to modify the bolt face. and find a barrel. 50 beowulf has a rebated rim that uses a 6.5 grendel bolt (tna sells them) but barrels harder to find and ammo ditto.

50 beo also has magazine issues - the horse cops consider them 556 mags, so if they're not pinned to 5 rounds of 556 you run the risk of getting in trouble.